Do you just need the magic of all 3 Races ?

Do you think that the "same" would happen if it's only Unicorn and Pegasus ?

If the C.M.C.s each give 1/3 of there magic to each other, would they be Alicorns ?

Could you give away your Magic before you die, and ... ?

Why didn't Lord_Tirek get some wings at the end of S4E26 Twilight's Kingdom part 2 ?