Biorhythm [Onslaught] Amonkhet Prerelease Promos but I didn't expect it

but I didn't expect it from the building itself

Set: Alpha Edition Type: Artifact Creature — Beast Rarity: Rare Cost: {6} Clockwork Beast enters the battlefield with seven +1/+0 counters on it

(You may cast this card from your graveyard for its flashback cost

Set: Unlimited Edition Type: Creature — Goblin Rarity: Rare Cost: {1}{R}{R} Other Goblins get +1/+1 and have mountainwalk

Biorhythm [Onslaught] Amonkhet Prerelease Promos but I didn't expect itSet: Onslaught Type: Sorcery Rarity: Rare Cost: {6}{G}{G} Each player's life total becomes the number of creatures they control. "I have seen life's purpose, and now it is my own." Kamahl, druid acolyte