Jace, Illusory Adept

+1: Add two mana of any color. Spend this mana only to cast illusion spells and activate abilities of illusions.
0: Jace, Illusory Adept becomes an X/X blue illusion with indestructible until end of turn where X is the number of illusions you control.
-X: Create an X/X blue illusion creature token with phasing and "this creature can't be blocked."