At the beginning of the Horde's precombat main phase, reveal an additional card from the top of the Horde's library. The Horde casts that card. Hero's Reward — When Altar of Mogis is put into a graveyard from anywhere, the Horde sacrifices two Minotaurs.
NM-Mint - $4.40
Lightly Played - $3.90
Moderately Played - $3.50
Heavily Played - $3.10
Damaged - $2.20
NM-Mint Non English - $4.40
Lightly Played Non English - $3.90
Moderately Played Non English - $3.50
Heavily Played Non English - $3.10
Damaged Non English - $2.20