Tidal Influence 
Enchantment
$0.19 #30444 0.25 32.0 years
Cast this spell only if no permanents named Tidal Influence are on the battlefield.
This enchantment enters with a tide counter on it.
At the beginning of your upkeep, put a tide counter on this enchantment.
As long as there is exactly one tide counter on this enchantment, all blue creatures get -2/-0.
As long as there are exactly three tide counters on this enchantment, all blue creatures get +2/+0.
Whenever there are four or more tide counters on this enchantment, remove all tide counters from it.
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Cards similar to Tidal Influence expected a card that isn't here?
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"Whenever there are four or more tide counters on this creature, remove all tide counters from it."
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"Other blue creatures you control get +1/+1."