Korgoth, the Penitent

As Korgoth, the Penitent enters the battlefield, choose Monk or Sorcerer.
•Monk—Korgoth gets +1/+1 for every equipment attached to him. Whenever Korgoth attacks, you may spend {x}. For every {u}{u} spent, tap up to one target creature. For every {w}{w}{r}{r} spent, take an additional combat phase after this one.
•Sorcerer—Korgoth has prowess. Whenever you cast an instant or sorcery spell with a single target, you may spend {w/u}{r/w}. If you do, copy that spell. You may choose a