Giani, Spirit of Cannons

Haste, Trample, Raid (If a creature attacked this
turn add 2 +1/+1 counters)
Whenever a red or green spell is casted, add 1 hit counter on whoever cast the spell. If a player gets
3 hit counters, destroy that player and choose one
card from their graveyard to under your control.
If this happens exile Giani, Spirit of Cannons.