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 - $3.80
LP - $3.00
MP - $2.30
HP - $1.50
DMG - $1.50