Martian Manhunter

Flying, Changeling
You may pay {w}{u}{b}{r}{g} instead of paying this
card's mana cost.
Martian Manhunter enters the battlefield with
a +1/+1 counter for each mana color spend to
cast this spell.
{5}: Martian Manhunter gains the abilities of
target creature until end of turn. Activate
this ability only once each turn.