Pony Headcanon #31: Siren Magic · 7:50pm Aug 19th, 2022
Boy, haven't done one of these in a while, have I? Last time was Shining Armor in, oh wow, September of last year. Anyway,
Siren Magic cannot create emotions out of thin air. They can only amplify what's already there. The more there is, the easier it is.
For example, their debut in the café, we're seeing the aftermath, and given it's a crowded café, there's probably a lot of emotions under the surface that the Siren Magic, gives a voice to, so to speak.
Battle of The Bands, look at the lyrics. They're encouraging them to turn an audition into a, well, Battle Of The Bands. They're coaxing them with magic AND words to amplify the competitive streak present tenfold.
Under Our Spell, they're already inclined to listen to the Dazzlings, so they're putting them further Under Their Spell.
And Welcome To The Show, they're fully under their control, so they can drop the subtlety and command the crowds to worship and adore them.
"Now you need us, come and heed us, nothing can stop us now."
Seems logical enough to me.