The Guardian

{1}{w}: Regenerate target creature.
{1}{u}: Target creature gets +0/+3 and hexproof
until end of turn.
{1}{b}: Target creature gets +1/+1 and wither
until end of turn.
{1}{r}: Target creature gets +3/+0 and double
strike until end of turn.
{1}{g}: Target creature gets +1/+1 until end of
turn and fights another Target creature.