Rootwire Amalgam (The Brothers' War)

Artifact Creature Ñ Golem - Prototype {1}{G} Ñ 2/3 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.)
{3}{G}{G}, Sacrifice this creature: Create an X/X colorless Golem artifact creature token, where X is three times this creature's power. It gains haste until end of turn. Activate only as a sorcery.