Cliffside Rescuer is a uncommon Creature — Kor Soldier card from Commander 2019 (C19), collector number 1. Current market price: $0.30, TCGplayer market prices via Scryfall.
Vigilance {T}, Sacrifice this creature: Target permanent you control gains protection from each of your opponents until end of turn. (It can't be blocked, targeted, dealt damage, enchanted, or equipped by anything controlled by those players.)