Roronoa, Demigod Barbarian

Companion — Your starting deck contains only
red and green cards, and land cards.
(If this card is your chosen companion, you may cast
it once from outside the game.)
When you cast your first red spell each turn, creatures you control get +2/+2, Trample and
Haste until end of turn.
When you cast your first green spell each turn, Roronoa, Demigod Barbarian deals damage equal to
it's power to target creature or Planeswalker an opponent controls.