Commander Mana Engine

Sacrifice a creature: Add one mana of any color.

Whenever a creature enters, you may add an amount of equal to the number of creatures you control that share a creature type with it.

When you cast this spell, create X 0/1 red Kobold creature tokens named Kobolds of Kher Keep, where X is the amount of mana spent to cast it. Flying Sacrifice another creature: Prossh gets +1/+0 until end of turn.