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Spur Def/Res is a two-tiered passive type C skill which debuted in Fire Emblem Heroes; the individual tiers of the skill are known as Spur Def/Res 1 and Spur Def/Res 2 in order from lowest to highest. Units with a Spur Def/Res skill will grant adjacent allies a boost to their Defense and Resistance stats during combat, similar to actvating Spur Def and Spur Res of the matching tier simultaneously; the exact boost increases with the skill's tier.