Tidal Spawner

Whenever a non-token creature you control with power three or greater dies, put a 3/3 blue Fish creature token with "When this creature, dies
put a 6/6 blue Whale creature token onto the battlefield with "When this creature dies, put a 9/9 blue Kraken creature token onto the battlefield."
"You might kill a whale but you won't kill the kraken whose dinner you just took." - Coastal Watchman