Life Orb

Life Orb is the universal damage-amp: no type restriction, no move-lock, no situational gate — just raw ×1.30 damage on every attacking move (the 5324/4096 fixed-point multiplier you'll find in the source). The HP recoil adds up quickly on multi-turn sweepers (~30% HP lost over three hits), so it's best on Pokémon that either hit hard enough to one-shot threats or have a reliable recovery / U-turn pivot. Magic Guard and Sheer Force holders skip the recoil entirely.