Ulalek, Fused Atrocity | Writhing Chrysalis | Eldritch Immunity

Cards

({2} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({R} magic symbol) ({G} magic symbol) available.

Cast
Writhing Chrysalis by paying ({2} magic symbol) ({R} magic symbol) ({G} magic symbol) .
Ulalek and
Writhing Chrysalis' first ability trigger.
Holding priority, cast
Eldritch Immunity by paying ({C} magic symbol) .
Ulalek triggers, causing you to pay ({C} magic symbol) ({C} magic symbol) 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} magic symbol) ({C} magic symbol) .
Resolve the copy of
Ulalek's trigger from step 4, causing you to pay ({C} magic symbol) ({C} magic symbol) to copy the
Writhing Chrysalis spell,
Ulalek's trigger and
Writhing Chrysalis' trigger.
Repeat from step 4.