Arms Shield

If foe initiates combat or if unit's HP ≥ 25% at start of combat, grants Atk/Spd/Def+2 to unit, unit deals +X damage (excluding area-of-effect Specials), and reduces damage from foe's attacks by X during combat (excluding area-of-effect Specials; if unit has weapon-triangle advantage, X = 3; if unit has weapon-triangle disadvantage, X = 1; if neither, X = 2).

If foe initiates combat or if unit's HP ≥ 25% at start of combat, grants Atk/Spd/Def+4 to unit, unit deals +X damage (excluding area-of-effect Specials), and reduces damage from foe's attacks by X during combat (excluding area-of-effect Specials; if unit has weapon-triangle advantage, X = 6; if unit has weapon-triangle disadvantage, X = 2; if neither, X = 4).

If foe initiates combat or if unit's HP ≥ 25% at start of combat, grants Atk/Spd/Def+7 to unit, unit deals +X damage (excluding area-of-effect Specials), and reduces damage from foe's attacks by X during combat (excluding area-of-effect Specials; if unit has weapon-triangle advantage, X = 10; if unit has weapon-triangle disadvantage, X = 4; if neither, X = 7).

If foe initiates combat or if unit's HP ≥ 25% at start of combat, grants Atk/Spd/Def+10 to unit, neutralizes penalties on unit, unit deals +X damage (excluding area-of-effect Specials), reduces damage from foe's attacks by X (excluding area-of-effect Specials; if unit has weapon-triangle advantage, X = 15; if unit has weapon-triangle disadvantage, X = 5; if neither, X = 10), and inflicts Special cooldown charge -1 on foe per attack during combat (only highest value applied; does not stack).