Nandai: Niji Danmaku

Shroud
Whenever you cast a red spell, Nandai: Niji Danmaku deals 2 damage to target creature or player.
Whenever you cast a blue spell, draw a card.
Whenever you cast a green spell, destroy target noncreature nonland permanent.
Whenever you cast a white spell, you gain 2 life.
Whenever you cast a black spell, each opponent discards a card.
(Multiple effects can trigger from the same spell.)