Poison the Platter

Spend only one color of mana to cast Poison the Platter
When Poison the Platter enters the battlefield, if {w} was spent to cast it, you become the monarch.
If {b} was spent to cast it, target opponent
becomes the monarch.
{1}. Sacrifice a Food: Deal 2 damage to the
monarch or a creature or planeswalker that player controls. Any player may activate this ability.