Kycoo the Ghost Destroyer
Dark/Spellcaster/4/1800/700
Each time this card inflicts Battle Damage to your opponent's Life Points, you can remove from play up to 2 Monster Cards in your opponent's Graveyard. As long as this card remains face-up on the field, your opponent cannot remove from play any cards in either Graveyard.

Simple as the text says

Sorry, 'bout that Half, just I kind of already knew just you know double checking.

Of course, since the effect is Continuous, it'd only prevent them from removing while face-up.