Oblivion Stone is a rare Artifact card from Double Masters (2XM), collector number 279. Current market price: $0.40 (foil $1.27), TCGplayer market prices via Scryfall.
{4}, {T}: Put a fate counter on target permanent. {5}, {T}, Sacrifice this artifact: Destroy each nonland permanent without a fate counter on it, then remove all fate counters from all permanents.