Rust Tick is a uncommon Artifact Creature — Insect card from Scars of Mirrodin (SOM), collector number 198. Current market price: $0.21 (foil $0.41), TCGplayer market prices via Scryfall.
You may choose not to untap this creature during your untap step. {1}, {T}: Tap target artifact. It doesn't untap during its controller's untap step for as long as this creature remains tapped.