Demon of Wailing Agonies 21 (Commander 2014)

Flying Lieutenant — As long as you control your commander, this creature gets +2/+2 and has "Whenever this creature deals combat damage to a player, that player sacrifices a creature of their choice."

NM - $3.40
LP - $2.70
MP - $2.00
HP - $1.50
DMG - $1.50