Sentinel is a MARVEL SNAP card that costs 2 energy and has 3 power. It has the effect: "On Reveal: Add another Sentinel to your hand."
It has variants that are part of the Pixel, Steampunk, Eric Guerrero, Blueprints, Jim Lee, Kael Ngu and Justin Fields categories.
Sentinel has synergy with Cable, Devil Dinosaur, Moon Girl, Cosmo and Cerebro.