Sliver Gravemother [Commander Masters]

Set: Commander Masters Type: Legendary Creature — Sliver Rarity: Mythic Cost: {W}{U}{B}{R}{G} The “legend rule” doesn't apply to Slivers you control.Each Sliver creature card in your graveyard has encore {X}, where X is its mana value.Encore {5} ({5}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)