Togglodyte is a uncommon Artifact Creature — Golem card from Unhinged (UNH), collector number 129. Current market price: $0.54 (foil $6.86), TCGplayer market prices via Scryfall.
This creature enters turned on. Whenever a player casts a spell, toggle this creature's ON/OFF switch. As long as this creature is turned off, it can't attack or block, and prevent all damage it would deal.