Aang, Elemental Master

Flying, First Strike, Trample, Lifelink
Whenever you cast a Multicoloured spell,
Aang, Elemental Master gets +2/+2 until
end of turn, target opponent takes 2 damage
and you draw a card.
If Aang, Elemental Master would die, Exile
it instead.
" I'm the avatar, keeper of the balance "