Defaced Trophy of a Winner

When Defaced Trophy of a Winner enters the
battlefield, each player exiles a card from their hand
with a 'G' counter on it.
{t}: Add{w}{u}{b}{r}{g}, this mana may only be spent
on historic spells or abilities.
{c}{c}{c}{c}{c}:exile and transform Defaced Trophy
of a Winner. Put a 'G' counter on it.

Relic Echos (This artifact may be used as a
commander)