River-fishing Bear

At the beginning of your end step, each opponent creates a 0/1 blue Fish creature token.
Whenever a Fish, Merfolk, Kraken, Leviathan, Octopus, or Serpent an opponent controls that
was dealt damage by a Bear you control dies
this turn, create a Food token.
Bears you control have "Sacrifice three Foods:
Put a +1/+1 counter on this permanent."