Homarid
{2}{U}
Creature -- Homarid
2/2
~this~ enters with a tide counter on it.
At the beginning of your upkeep, put a tide counter on ~this~.
As long as there is exactly one tide counter on ~this~, it gets -1/-1.
As long as there are exactly three tide counters on ~this~, it gets +1/+1.
Whenever there are four or more tide counters on ~this~, remove all tide counters from it.
Tidal Influence
{2}{U}
Enchantment
Cast ~this~ only if no permanents named Tidal Influence are on the battlefield.
~this~ enters with a tide counter on it.
At the beginning of your upkeep, put a tide counter on ~this~.
As long as there is exactly one tide counter on ~this~, all blue creatures get -2/-0.
As long as there are exactly three tide counters on ~this~, all blue creatures get +2/+0.
Whenever there are four or more tide counters on ~this~, remove all tide counters from it.