Niv-Mizzet, Guild Master

Whenever you cast a white spell, gain 1 life
Whenever you cast a blue spell, draw a card
Whenever you cast a black spell, return target creature from your graveyard to your hand
Whenever you cast a red spell, deal 2 damage to any target
Whenever you cast a green spell, create a 1/1 green elf
Whenever you cast a colorless spell, create a treasure artifact token with "{t}sacrifice this artifact; Add one mana of any color