All Will Be One is a mythic Enchantment card from Phyrexia: All Will Be One Promos (PONE), collector number 118p. Current market price: $19.04 (foil $29.69), TCGplayer market prices via Scryfall.
Whenever you put one or more counters on a permanent or player, this enchantment deals that much damage to target opponent, creature an opponent controls, or planeswalker an opponent controls.