Guppy

Pay {3}: Create a 3/3 blue fish 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."
At the beginning of your upkeep, if Guppy didn't untap, create a Treasure artifact token.
—
The Kraken stirs. And a billion sushi dinners cry out
in vengeance.