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.)
![Sliver Gravemother [Commander Masters] | Grognard Games](http://grognardgames.com/cdn/shop/files/9f5d253e-9eb2-423c-90ee-68f27ec6bf88_286a0670-ddb1-4cd6-bcaa-f7659d44faa4.png?v=1776139970)
