This move effect may be in need of research. Reason:In which games does the Life Orb boost the damage dealt by Future Sight/Doom Desire (other than Generation VI)? Does it deal damage to the user for these moves, and when? You can discuss this on the talk page.
Boosts the power of the holder's damaging moves by ~30% (5324/4096), but the holder takes damage equal to 10% of its maximum HP after it uses a damaging move (rounded down, but not less than 1). It does not boost the power of moves that do not use the damage formula (although the holder still takes damage) or self-inflicted confusion damage.
If a Pokémon steals a Life Orb with Thief or Covet, then the Life Orb does not boost the power, but the attacker takes damage for the use of that move that stole the Life Orb. The Life Orb activates before Pickpocket, so even if a Pokémon's held Life Orb is stolen by Pickpocket, it still damages the attacking Pokémon for that move. If a Pokémon steals a Life Orb with Magician, it will take damage for the use of that move that stole the Life Orb. If the holder uses Fling, then Life Orb boosts the power but doesn't damage the user.
As the Life Orb inflicts indirect damage, Magic Guard prevents a Pokémon from taking damage from the Life Orb. If a Pokémon with Sheer Force uses a move boosted by that Ability, it does not take damage from Life Orb for that move.
For Dynamax Pokémon, the damage is equal to 10% of the Pokémon's non-Dynamax maximum HP.
The Life Orb damages its holder without displaying any message.