Jetmir, Nexus of Revels + Skittering Precursor + Sword of the Meek + Bartolomé del Presidio
Jetmir, Nexus of Revels
Skittering Precursor
Sword of the Meek
Bartolomé del Presidio
Infinite +1/+1 counters on a creatureInfinite colorless manaInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggers
How it works
Activate Bartolomé del Presidio by sacrificing Sword of the Meek.
Skittering Precursor triggers, creating a 0/1 Eldrazi Spawn creature token.
When the Eldrazi Spawn enters the battlefield as a 1/1 due to Jetmir, Sword of the Meek triggers, returning Sword of the Meek from your graveyard to the battlefield attached to the Eldrazi Spawn.
Resolve the Bartolomé del Presidio ability, putting a +1/+1 counter on it.
Activate the Eldrazi Spawn by sacrificing it, adding C.
Repeat.
This clever loop turns a modest sacrifice outlet into an engine for infinite resources by exploiting a clever stat-buffing interaction. You use Bartolomé del Presidio to continually sacrifice Sword of the Meek, which immediately triggers Skittering Precursor to spawn an Eldrazi. Thanks to the passive stat boosts from Jetmir, Nexus of Revels, that entering token is treated as a 1/1, which in turn satisfies Sword of the Meek's resurrection condition to return it straight to the battlefield. From there, you can cash in the Eldrazi's mana ability for colorless energy while growing your main sacrifice outlet endlessly.