The Filigree Sylex is a rare Legendary Artifact card from Phyrexia: All Will Be One (ONE), collector number 394. Current market price: $0.31 (foil $0.47), TCGplayer market prices via Scryfall.
{T}: Put an oil counter on The Filigree Sylex. {T}, Sacrifice The Filigree Sylex: Destroy each nonland permanent with mana value equal to the number of oil counters on The Filigree Sylex. {T}, Remove ten oil counters from among permanents you control and sacrifice The Filigree Sylex: It deals 10 damage to any target.