Ulalek, Fused Atrocity + Echoes of Eternity + Writhing Chrysalis

Ulalek, Fused Atrocity

Echoes of Eternity

Writhing Chrysalis

How it works

1. Cast Writhing Chrysalis by paying 2.
2. Ulalek and Writhing Chrysalis' first ability triggers twice, and Echoes of Eternity triggers once.
3. Resolve one of Writhing Chrysalis' triggers, creating two 0/1 Eldrazi Spawn creature tokens.
4. Resolve the Echoes of Eternity trigger, copying the Writhing Chrysalis spell.
5. Resolve the copy of the Writhing Chrysalis spell, creating a token copy of it.
6. Activate both Eldrazi Spawn creature tokens by sacrificing it, adding CC.
7. Writhing Chrysalis triggers twice for each Eldrazi sacrificed, putting a total of four +1/+1 counters on itself.
8. Resolve one of Ulalek's triggers, causing you to pay CC to copy the Writhing Chrysalis spell, Ulalek's trigger and Writhing Chrysalis' trigger.
9. Resolve the copy of Writhing Chrysalis' trigger, creating two 0/1 Eldrazi Spawn creature tokens.
10. Activate both Eldrazi Spawn creature tokens by sacrificing it, adding CC.
11. Writhing Chrysalis triggers twice for each Eldrazi sacrificed, putting a total of four +1/+1 counters on itself.
12. Resolve the copy of Ulalek's trigger from step 7, causing you to pay CC to copy each Writhing Chrysalis spell, Ulalek's trigger and Writhing Chrysalis' trigger.
13. Repeat from step 8 any number of times.
14. End the combo by letting the stack resolve, putting an infinite number of Writhing Chrysalis tokens onto the battlefield.

This ingenious loop kicks off the moment you cast Writhing Chrysalis, triggering its own spawn-making ability alongside Echoes of Eternity and Ulalek, Fused Atrocity. Echoes of Eternity doubles up your cast triggers and copies the spell itself, while the resulting Eldrazi Spawn tokens cheerfully sacrifice themselves to feed the exact mana needed to fuel Ulalek, Fused Atrocity's copying ability. Because each sacrificed spawn also feeds Writhing Chrysalis's growth trigger, you are rewarded with an ever-expanding hoard of creature tokens and towering +1/+1 counters that can grow infinitely as the stack perpetually replicates itself.