Infinite creature ETBInfinite creature LTBInfinite death triggersInfinite lifegainInfinite lifegain triggersInfinite lifelossInfinite creature sacrifice triggersInfinite unlocking of Rooms you control
How it works
Activate Marina by tapping it, unlocking Awakening Hall.
Awakening Hall triggers, returning all creature cards in your graveyard to the battlefield.
Activate Yahenni by sacrificing one of the returned creatures.
When the creature dies, Marina triggers, and Funeral Room triggers if it's unlocked.
Resolve the Marina trigger, untapping it.
Resolve the Funeral Room trigger, if applicable, causing each opponent to lose 1 life and you to gain 1 life.
Resolve the Yahenni ability.
Activate Marina by tapping it, locking Awakening Hall.