Double Stone is a Combo Ability in Kirby 64: The Crystal Shards obtained by mixing two Stone abilities. The ability allows Kirby to turn into a giant golem. When he is a golem, he is invulnerable, but cannot jump. If Kirby stands on a slope, he will roll down, destroying any enemy he touches. Pressing the attack button while Kirby is a golem will cause Kirby to return to normal, leaving behind a blast of smaller rocks around his body, which can destroy enemies and is effective against bosses.
Kirby becomes a rock that will slowly roll. By moving Kirby will become a behemoth sized version of himself and crush anything in his path. By pressing B again Kirby launches all the rock off him and damages enemies.