All 12 Combos with Writhing Chrysalis

Ulalek, Fused Atrocity + Echoes of Eternity + Writhing Chrysalis

Other: Infinite copies of abilities you control on the stack, Infinite creature tokens, Infinite death triggers, Infinite ETB, Infinite LTB, Infinite sacrifice triggers, Infinite +1/+1 counters on a creature

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