During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Continuous Spell Card in your hand. You can send 1 card from your hand to the Graveyard to destroy 1 Special Summoned monster on the field.
Can destroy Special summoned monsters with his effect. (Not once per turn.)
Requires a maintenance cost during each of your End Phases.
In a meta with lots of Special summoning, Koa'ki Meiru Ice can still be effective even when he only stays on the field for one turn.
Effect is not once per turn, meaning you can clear your opponent's monster zone provided all those monsters were Special summoned and you have enough cards on hand.
You could fit Koa'ki Meiru Ice into an Aquaactress deck because of their similar type and attribute. Use Koa'ki Meiru Ice as a beater and monster removal while he is sustained by the Aquarium Continuous Spells.