Sliver Gravemother [Commander Masters] 141 The vast castle at Casterly

The vast castle at Casterly Rock serves as both a symbol of Lannister supremacy and an unbreakable fortress

so it is optional which you use in your games

Stated card drop frequencies are an approximate average across the entire production of a product

Each opponent loses 3 life unless that player sacrifices a nonland permanent or discards a card

Sliver Gravemother [Commander Masters] 141 The vast castle at CasterlySet: 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