Kozilek, Essence Eraser

Manaweave - The first time an opponent casts a
spell each turn, counter it unless they pay {2}. If they do pay, do the following depending on
the colors of mana that was paid —
• White: You gain 5 life.
• Blue: Draw a card.
• Black: Exile target creature.
{bull} Red: Kozilek deals 5 damage to target player.
{bull} Green: Add five {c} at the start of your next
main phase.