Head Set Designer: Daniel Ingram · 8:25pm Dec 20th, 2013
You may have noticed that in Flight to the Finish's Friendship is Card Games blog, "Hearts Strong as Horses" had a subtype, Song. Well, while creatures and tribals always get at least one creature type(1), other cards don't get subtypes unless there's a mechanical reason. Either the type has inherent rules baggage, as is the case with basic land types and Equipment, or it acts as a flag for cards to look for, which the case for everything from Arcane to Urza's(2, 3).
Being the design fascist(4) that I am, I would be remiss if I did not justify the existence of the Song type. That's precisely what this blog is here to do(6).
1. With one notable exception.
2. I'm pretty sure that those are the alphabetically first and last noncreature subtypes. Feel free to prove me wrong in the comments. 
3. Admittedly, there is one case where Urza's was used for purely cosmetic purposes, but Time Spiral block was weird.
4. Like a grammar Nazi, but the rules aren't as arbitrary(5).
5. Whether the rules of Magic design and templating are more or less arbitrary than those of English grammar and punctuation is left as an exercise for the reader.
6. For the sake of you not having to scroll back and forth just to read silly footnotes, I put the cards in this final silly footnote. Let's get to them:
"Giggle at the Ghosty" W
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Giggle at the Ghosty".
W, Sacrifice "Giggle at the Ghosty": Choose a color. Up to X target creatures gain protection from that color until end of turn, where X is the number of verse counters on "Giggle at the Ghosty".
Live Performance 1W
Instant
Target non-Aura enchantment becomes a creature with power and toughness equal to its converted mana cost in addition to its other types until end of turn. If that enchantment is a Song, you may have its power and toughness be equal to the number of verse counters on it instead.
"Smile, Smile, Smile" 1W
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Smile, Smile, Smile".
Sacrifice "Smile, Smile, Smile": You gain 2 life for each verse counter on "Smile, Smile, Smile".
Peerless Virtuoso 1WW
Creature — Pony
At the beginning of your upkeep, put a verse counter on each Song you control.
"It isn't lonely at the top. I have music. What more could I need?"
1/1
"Art of the Dress" 2W
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Art of the Dress".
W, Sacrifice "Art of the Dress": Search your library for an Aura or Equipment card with converted mana cost equal to or less than the number of verse counters on "Art of the Dress", reveal it, then shuffle your library. You may put that card onto the battlefield. If you don't, put it into your hand.
Luminous Resonance 2W
Instant
Destroy target artifact or enchantment. You gain life equal to the number of counters on that permanent.
"There are many ways to take in a work of art, but none quite like enjoying it so very much that it falls apart from the intensity of your appreciation."
—Princess Luna
Canterlot Quartet 3W
Creature — Pony
T: Put a verse counter on target Song.
"No gig too small, no number too obscure."
—Oath of the Equestrian Musicians' Guild
2/4
Spontaneous Musical Number XW
Instant
Look at the top X cards of your library. You may put an enchantment card with converted mana cost X or less from among them onto the battlefield. Put the rest on the bottom of your library in any order. If a Song enters the battlefield this way, put Y verse counters on it, where Y is X minus that Song's converted mana cost.
"Cupcakes" 1U
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Cupcakes".
Sacrifice "Cupcakes": Each player draws X cards, where X is the number of verse counters on "Cupcakes".
"No, not that kind. This card's blue, not black."
—Pinkie Pie, Bearer of Laughter
"Hush Now, Quiet Now" 1U
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Hush Now, Quiet Now".
Sacrifice "Hush Now, Quiet Now": Creatures you don't control get -X/-0 until end of turn, where X is the number of verse counters on "Hush Now, Quiet Now".
Nothing but Treble 1U
Enchantment — Aura
Enchant creature
Enchanted creature can't be blocked except by creatures with defender.
Whenever enchanted creature deals combat damage to a player, you may put a verse counter on target Song.
Only on Ungula can spies get away with humming their own background music.
"This Day Aria" 1UU
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "This Day Aria".
U, Sacrifice "This Day Aria": Put onto the battlefield a token that's a copy of target creature with converted mana cost equal to or less than the number of verse counters on "This Day Aria".
"An Evil Enchantress" B
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "An Evil Enchantress".
B, Sacrifice "An Evil Enchantress": Target player reveals X cards from his or her hand, where X is the number of verse counters on "An Evil Enchantress". Choose one of them. That player discards that card.
"Pinkie's Brew" 1BB
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Pinkie's Brew".
B, Sacrifice "Pinkie's Brew": Return up to X target creature cards from your graveyard to your hand, where X is the number of verse counters on "Pinkie's Brew".
Haunting Refrain 2B
Enchantment
Activated abilities of Songs cost an additional "Pay 1 life for each verse counter on this Song" to activate.
All music stirs the souls of those who hear it. Some frappes them.
"Babs Seed" 3B
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Babs Seed".
Sacrifice "Babs Seed": Each opponent loses life equal to the number of verse counters on "Babs Seed". You gain life equal to the life lost this way.
"You've Got to Share" 1R
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "You've Got to Share".
Sacrifice "You've Got to Share": Up to X target creatures attack this turn if able, where X is the number of verse counters on "You've Got to Share".
"Sweetie's Big Race" 1RR
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Sweetie's Big Race".
1R, Sacrifice "Sweetie's Big Race": Attacking creatures get +X/+0 until end of turn, where X is the number of verse counters on "Sweetie's Big Race".
Jarring Discordance 2R
Sorcery
Each enchantment deals X damage to its controller, where X is 1 plus the number of counters on that enchantment.
Discord opposes harmony in every sense.
Infrasonic Pulse 3RR
Sorcery
As an additional cost to cast Infrasonic Pulse, remove X verse counters from among Songs you control.
Infrasonic Pulse deals X damage to target player and each creature he or she controls.
What you can't hear can hurt you.
Enchanting Vocalist 1G
Creature — Unicorn
Whenever you cast a Song spell, you may draw a card.
Music is music. A good performer is what makes true art.
0/2
"Find a Pet" 1GG
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Find a Pet".
G, Sacrifice "Find a Pet": Search your library for a creature card with converted mana cost equal to or less than the number of verse counters on "Find a Pet" and put it onto the battlefield. Then shuffle your library.
Tone-Deaf Jack 2G
Creature — Donkey
Protection from Songs
Ponies and donkeys may be closely related, but their magics are anything but.
3/3
"Winter Wrap-Up" 2G
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Winter Wrap-Up".
Sacrifice "Winter Wrap-Up": Untap up to X target lands, where X is the number of verse counters on Winter Wrap-Up.
"So Many Wonders" 2GG
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "So Many Wonders".
G, Sacrifice "So Many Wonders": Each player may put up to X permanent cards from his or her hand onto the battlefield, where X is the number of verse counters on "So Many Wonders".
Bass Cannon 2
Artifact — Equipment
Equipped creature has trample and "1, Remove a verse counter from a Song you control: This creature gets +1/+0 until end of turn."
Equip 2
Sometimes the bass drops you.
"A True, True Friend" GW
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "A True, True Friend".
(gw), Sacrifice "A True, True Friend": Up to X target creatures each gain hexproof and indestructible until end of turn, where X is the number of verse counters on "A True, True Friend".
Celestia's Ballad 1WB
Enchantment — Song
At the beginning of your upkeep, put a verse counter on Celestia's Ballad
WB, Sacrifice Celestia's Ballad: Return to the battlefield target creature card from your graveyard with converted mana cost equal to or less than the number of verse counters on Celestia's Ballad. Put a divinity counter on that creature. It has indestructible for as long as it has a divinity counter on it.
Omnipresent Earworm 1UB
Creature — Worm Illusion
Omnipresent Earworm can't be blocked if defending player controls a Song.
Whenever a player activates an ability of a Song, return Omnipresent Earworm from your graveyard to your hand.
Plenty of songs can get stuck in your head. Few go so far as to eat it.
2/1
Crusaders' Theme 1RG
Enchantment — Song
At the beginning of your upkeep, put a verse counter on Crusaders' Theme.
(rg), Sacrifice Crusaders' Theme: Destroy up to X target nonbasic, noncreature permanents, where X is the number of verse counters on Crusaders' Theme.
"Morning in Ponyville" 2UR
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Morning in Ponyville".
UR, Sacrifice "Morning in Ponyville": You may put up to X creature cards from your hand onto the battlefield, where X is the number of verse counters on "Morning in Ponyville". Those creatures gain haste and "At the beginning of the end step, put this creature on top of its owner's library."
"Raise This Barn" 2BG
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Raise This Barn".
(bg), Sacrifice "Raise This Barn": Search your library and graveyard for up to X land cards and put them onto the battlefield tapped, where X is the number of verse counters on "Raise This Barn". Then shuffle your library.
"Becoming Popular" 2GU
Enchantment — Song
At the beginning of your upkeep, put a verse counter on "Becoming Popular".
(gu), Sacrifice "Becoming Popular": Until end of turn, target creature gains the abilities of each of up to X other target creatures, where X is the number of verse counters on "Becoming Popular".
Thank you.
These are all pretty good, but I think my favorite has to be the Omnipresent Earworm.
But what creature type does Live Performance make the enchantment?
1628699
Brushwagg.
You do realize that between this and the ones you've done for season 4 so far, you're going to have to do this for ALL the earlier episodes... Please?
Not sure how "Raise This Barn" is black in the least, and you forgot to define X on "So Many Wonders"
And "Cupcakes"'s flavor text... there are no words or emoticons
Sure wish Wizards would give this much support to the Song subtype. They're always such great sleeper cards.
"Oh, hey guys. Remember that Midsummer Revel I played eight turns ago?"
Have to agree with 1630262, "Raise This Barn" doesn't seem black in the least. It definitely deserves the extra color commitment, though, since unlike most ramp effects it's not restricted to basics.
I also concur with 1630285. I wish Song was a real subtype, especially since I want to make a Planeswalker fan-card that specifically interacts with them (Douglas "Looney Toons" Sangnoir, whose damaged magegift can't cast spells deliberately, but instantly and instinctively translates mundane songs into magical effects.)
1917089
Thanks, Prog. It's not like I didn't have enough to read as it was.