Icevale Witch

This card can be Normal Summoned in Defense Position. When your opponent Summons an Effect Monster, you can pay 500 Life Points to negate it's effect(s) until the End Phase. This card cannot be targeted by the opponent's card effects. During your Main Phase, You can Normal Summon this card from the Graveyard.

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This card can be Normal Summoned in Defense Position. Once per turn, when your opponent Summons an Effect Monster, you can pay 800 Life Points to negate it's effect(s) until the End Phase. This card cannot be targeted by the opponent's monster card effects. During your Main Phase, You can Normal Summon this card from the Graveyard.

still too over-bearing?

You can Normal Summon this card from the Graveyard.

that's the problematic part.

This card can be Normal Summoned in Defense Position. When your opponent Summons an Effect Monster, you can pay 500 Life Points to negate it's effect(s) until the End Phase. This card cannot be targeted by the opponent's card effects.

So with no Normal Revival, it would be okay?

along with your fix.

Or make the revival actually costs something.

Banishing 1-2 icevale monster from the grave?

This card can be Normal Summoned in Defense Position. Once per turn, when your opponent Summons an Effect Monster, you can pay 800 Life Points to negate it's effect(s) until the End Phase. This card cannot be targeted by the opponent's monster card effects. During your Main Phase, You can banish 2 "Icevale" Monsters from the Graveyard: Normal Summon this card from the Graveyard.

Shuffling would be more in-theme.

But I like it.