Conduit of Storms
Creature — Werewolf Horror
Whenever this creature attacks, add at the beginning of your next main phase this turn.
: Transform this creature.
Conduit of Emrakul
Creature — Eldrazi Werewolf
Whenever this creature attacks, add 
at the beginning of your next main phase this turn.
Raymond Swanland
Rulings
You’ll add mana at the beginning of the next main phase whether or not Conduit of Storms (or Conduit of Emrakul) is still on the battlefield.
(wotc • 2025-01-24)
If Conduit of Storms attacks and you transform it into Conduit of Emrakul in response, you’ll add {R}, not {C}{C} and not {C}{C}{R}.
(wotc • 2025-01-24)
Rulings
You’ll add mana at the beginning of the next main phase whether or not Conduit of Storms (or Conduit of Emrakul) is still on the battlefield.
(wotc • 2025-01-24)
If Conduit of Storms attacks and you transform it into Conduit of Emrakul in response, you’ll add {R}, not {C}{C} and not {C}{C}{R}.
(wotc • 2025-01-24)