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Whenever Conduit of Storms attacks, add {R} at the beginning of your next main phase this turn.
{3}{R}{R}: Transform Conduit of Storms.
For more information on double-faced cards, see the Shadows over Innistrad mechanics article (http://magic.wizards.com/en/articles/archive/feature/shadows-over-innistrad-mechanics).
If Conduit of Storms attacks and you transform it into Conduit of Emrakul later in combat, you’ll add {R} to your mana pool, not {C}{C} and not {C}{C}{R}.
You’ll add mana to your mana pool at the beginning of the next main phase whether or not Conduit of Emrakul is still on the battlefield.
You’ll add mana to your mana pool at the beginning of the next main phase whether or not Conduit of Storms is still on the battlefield.
