Elesh Norn, Mother of Machines (#414) (Phyrexian): Phyrexia: All Will Be One Hour of Devastation As long as the top

As long as the top card of your library is black

When Stoneforge Mystic enters the battlefield

and you may spend mana as though it were mana of any type to cast those spells

Spend this mana only to cast creature spells

(Exile all spells and abilities from the stack

Elesh Norn, Mother of Machines (#414) (Phyrexian): Phyrexia: All Will Be One Hour of Devastation As long as the topVigilance If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time. Permanents entering the battlefield don't cause abilities of permanents your opponents control to trigger.