Spell Resistance is a game mechanic commonly found in role-playing games, particularly in fantasy settings. It represents a creature's ability to resist or negate the effects of magical spells. When a spell is cast on a target with spell resistance, the caster must overcome this resistance by rolling a die and adding their spellcasting ability modifier to the result. If the total exceeds the target's spell resistance value, the spell takes effect; otherwise, it fails. This mechanic adds an element of strategy, as players must consider the spell resistance of their opponents when planning their actions in combat or other magical encounters.