Homarid — Fallen Empires #19c

This creature enters with a tide counter on it.

At the beginning of your upkeep, put a tide counter on this creature.

As long as there is exactly one tide counter on this creature, it gets -1/-1.

As long as there are exactly three tide counters on this creature, it gets +1/+1.

Whenever there are four or more tide counters on this creature, remove all tide counters from it.