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.)
Near Mint Foil - £0.80
Lightly Played Foil - £0.70
Moderately Played Foil - £0.60
Heavily Played Foil - £0.40
Damaged Foil - £0.30
Near Mint Foil Non English - £0.80
Lightly Played Foil Non English - £0.70
Moderately Played Foil Non English - £0.60
Heavily Played Foil Non English - £0.40
Damaged Foil Non English - £0.30