Mycosynth Golem [Fifth Dawn] Centaur sacrifice it and attach Breath

sacrifice it and attach Breath of Fury to a creature you control

Gravity is truly what you make of it

that creature's controller sacrifices it

When Nightshade Assassin enters the battlefield

Set: Ixalan Prerelease Promos Type: Creature — Dinosaur Avatar Rarity: Rare Cost: {3}{R}{R}{R} When Burning Sun's Avatar enters the battlefield

Mycosynth Golem [Fifth Dawn] Centaur sacrifice it and attach BreathSet: Fifth Dawn Type: Artifact Creature Golem Rarity: Rare Cost: {11} Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.) Artifact creature spells you cast have affinity for artifacts. (They cost {1} less to cast for each artifact you control.)