Helm of Obedience [Alliances] Vampire Shade the answer may lie in

the answer may lie in joining the crew of the *Weatherlight* as they seek to rescue their abducted captain Sisay

Set: Vanguard Series Type: Vanguard Rarity: Rare Creatures you control have shadow

where X is the number of Slivers on the battlefield

Set: Mercadian Masques Type: Sorcery Rarity: Rare Cost: {X}{R}{R} Each player sacrifices X lands

You gain 2 life for each creature destroyed this way

Helm of Obedience [Alliances] Vampire Shade the answer may lie inSet: Alliances Type: Artifact Rarity: Rare Cost: {4} {X}, {T}: Target opponent mills a card, then repeats this process until a creature card or X cards have been put into their graveyard this way, whichever comes first. If one or more creature cards were put into that graveyard this way, sacrifice Helm of Obedience and put one of them onto the battlefield under your control. X can't be 0.