Axiom, Arcum's Bastion

Axiom, Arcum's Bastion enters the battlefield
tapped.
{t}: Add {c}.
{t}, Move a charge counter from another
permanent you control to Axiom: Add one mana
of any color. Then, if there are five or more
charge counters on Axiom, exile it and return it
to the battlefield under its owner's control transformed.