Helm of Obedience [Alliances] Tenth Edition Prerelease Promos Whenever Dragonlord Ojutai deals combat

Whenever Dragonlord Ojutai deals combat damage to a player

Set: Eternal Masters Type: Artifact Rarity: Uncommon Cost: {3} Sacrifice a creature: Add {C}{C}

and the brightest thunder-bolt is elicited from the darkest storm

Set: Unlimited Edition Type: Enchantment — Aura Rarity: Rare Cost: {W}{W} Enchant creature

Helm of Obedience [Alliances] Tenth Edition Prerelease Promos Whenever Dragonlord Ojutai deals combatSet: 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.