Leeches

Target player loses all poison counters. Leeches deals that much damage to that player.

Price of Betrayal

Remove up to five counters from target artifact, creature, planeswalker, or opponent.

Suncleanser

When Suncleanser enters the battlefield, choose one —
• Remove all counters from target creature. It can't have counters put on it for as long as Suncleanser remains on the battlefield.
• Target opponent loses all counters. That player can't get counters for as long as Suncleanser remains on the battlefield.