Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Grim Poppet + Bloodthrone Vampire
Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
Grim Poppet
Bloodthrone Vampire
Destroy any number of creaturesDestroy each creature that enters the battlefield under an opponent's controlInfinite -1/-1 countersInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite death triggersInfinitely large creature until end of turnLock
How it works
If Grim Poppet has any -1/-1 counters on it, activate it by removing a -1/-1 counter from it.
Repeat step 1 as necessary until Grim Poppet has no -1/-1 counters on it.
Activate Bloodthrone Vampire by sacrificing Grim Poppet.
When Grim Poppet dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Resolve the Bloodthrone Vampire ability.
Repeat.
Resolve all Grim Poppet abilities, putting infinite -1/-1 counters on any number of creatures.