Against All Odds

Target creature you control gets +6/+6, first
strike, hexproof, indestructible, and haste until
end of turn if an opponent controls a creature
with greater power than the target. Discard your
hand.
"The giant lurched towards Heb, maw open. His
meaty hands were large enough to flatten carriages.
But the man who would found the Hero-Core just
smiled, and drew his blade.—The History of the
Hero-Core, Volume I