Helm of Obedience [Alliances] Tenth Edition Prerelease Promos and the brightest thunder-bolt is

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

"This 'standing windstorm' can hold us off indefinitely

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

Set: Alpha Edition Type: Enchantment — Aura Rarity: Common Cost: {U}{U} Enchant land

Boorish Herder enters the battlefield or attacks

Helm of Obedience [Alliances] Tenth Edition Prerelease Promos and the brightest thunder-bolt isSet: 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.