Yosef, Rival to the Seas

{t}: Sacrifice an Island you control,
create a 3/3 blue Fish creature token with "When this creature dies, create a 6/6 blue Whale creature token with 'When this creature dies, create a 9/9 blue Kraken creature token.'"
He knows the sea is dangerous and the storm terrible, but he has never found these dangers sufficient to keep himself ashore.