Kraken's Beak

{2}{u}{u}, {t}: Target creature you control
has base power and toughness 9/9 until end of
turn. At the beginning of your next end step,
if that creature didn't deal combat damage to a
player this turn, return it to its owner's hand.
Otherwise, sacrifice Kraken's Beak and create
a 9/9 blue Kraken creature token.
What was thought at first to just be a fossil
of a kraken, was actually a prison for the same
beast.