Imperious King

Menace, protection from Humans
Whenever an opponent casts a spell, create X
Treasure tokens, where X is the number of spells
they've cast this turn minus 1. (They're colorless artifact tokens with "{t}, Sacrifice this artifact: Add
one mana of any color.")
{b}{b}, Sacrifice a Treasure: Another target
creature gets -2/-2 until end of turn.