Oblivion Stone is a rare Artifact card from Mirrodin (MRD), collector number 222. Current market price: $1.37 (foil $19.23), 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.