Demonic Rock Dragon Mech, Dol Dra-gollum

■ [Call Cost] [Put one or more 《Duel Golem》 from your field into this card's soul & Pay 2 gauge]

■ All 《Duel Golem》 on your field get Penetrate.

■ Overkill [Pay 1 gauge during your main phase] For this turn, this card gets critical+4, and its attack cannot be nullified if it is attacking alone!!

■ Move Soulguard