Glaring Fleshraker 7 (Modern Horizons 3)

Whenever you cast a colorless spell, create a 0/1 colorless Eldrazi Spawn creature token with "Sacrifice this token: Add {C}." Whenever another colorless creature you control enters, this creature deals 1 damage to each opponent.

NM - $1.00
LP - $0.80
MP - $0.70
HP - $0.70
DMG - $0.70