Helm of Obedience [Alliances] World Championship 2011 Card Pack This card cannot be used

This card cannot be used as a Synchro Material Monster

untap Mana Vault

you can remove from play 1 Plant-Type monster from your Graveyard to change 1 monster your opponent controls to face-up Attack Position

negate the activation

(Mana symbols on that permanent remain unchanged

Helm of Obedience [Alliances] World Championship 2011 Card Pack This card cannot be usedSet: 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.