Brokkos, Apex of Forever + Infested Thrinax + Pitiless Plunderer + Umbral Collar Zealot

Brokkos, Apex of Forever

Infested Thrinax

Pitiless Plunderer

Umbral Collar Zealot

How it works

1. Cast Infested Thrinax by paying 3.
2. When Infested Thrinax enters the battlefield, it triggers, causing you to create a number of 1/1 Saproling creature tokens when a nontoken creature you control dies.
3. Activate Umbral Collar Zealot by sacrificing Brokkos.
4. When Brokkos dies, Infested Thrinax and Pitiless Plunderer trigger.
5. Resolve the Infested Thrinax trigger, creating six 1/1 Saproling creature tokens.
6. Resolve the Pitiless Plunderer trigger, creating a Treasure token.
7. Resolve the Umbral Collar Zealot ability
8. Activate Umbral Collar Zealot four times by sacrificing four Saprolings.
9. When the Saprolings die, Pitiless Plunderer triggers four times, creating four Treasure tokens.
10. Resolve the Umbral Collar Zealot abilities
11. Activate five Treasures by tapping and sacrificing them, adding 2U/B.
12. Cast Brokkos from your graveyard for its mutate cost by paying 2U/B, putting it on top of a Saproling.
13. Repeat from step 3.

This ingenious loop transforms the recursive power of Brokkos, Apex of Forever into a self-sustaining engine fueled by Pitiless Plunderer and Infested Thrinax. By sacrificing Brokkos to Umbral Collar Zealot, you trigger a cascade of deaths that Infested Thrinax rewards with an army of Saprolings, while Pitiless Plunderer simultaneously converts every casualty into a valuable Treasure token. You then use that generated treasure to recast Brokkos directly from your graveyard via its mutate ability, instantly resetting the entire cycle for infinite death, sacrifice, and mana triggers.