Beast of Burden [Urza's Legacy Promos] Human Mercenary Set: Portal Three Kingdoms Type:

Set: Portal Three Kingdoms Type: Creature — Human Soldier Rarity: Common Cost: {2}{W} Horsemanship (This creature can't be blocked except by creatures with horsemanship

Set: Magic 2015 Promos Type: Creature — Dragon Rarity: Rare Cost: {5}{R}{R} Flying

Ob Nixilis Type: Creature — Hydra Rarity: Rare Cost: {4}{G}{G} Trample

and they are everywhere

Beast of Burden [Urza's Legacy Promos] Human Mercenary Set: Portal Three Kingdoms Type:Set: Urza's Legacy Promos Type: Artifact Creature Golem Rarity: Rare Cost: {6} Beast of Burden's power and toughness are each equal to the number of creatures on the battlefield. "If it is meant to be nothing but a machine," Karn finally asked Jhoira, "why did Urza build it to be like me?"