Ulalek, Fused Atrocity + Writhing Chrysalis + Strionic Resonator

Ulalek, Fused Atrocity

Writhing Chrysalis

Strionic Resonator

How it works

1. Cast Writhing Chrysalis by paying 2.
2. Ulalek and Writhing Chrysalis' first ability trigger.
3. Holding priority, activate Strionic Resonator by paying 2 and tapping it, copying Ulalek's trigger.
4. Resolve the copy of Ulalek's trigger, causing you to pay CC to copy the Writhing Chrysalis spell, Ulalek's trigger and Writhing Chrysalis' trigger.
5. Resolve the copy of the Writhing Chrysalis spell.
6. Resolve the copy of Writhing Chrysalis' trigger, creating two 0/1 Eldrazi Spawn creature tokens.
7. Activate both Eldrazi Spawn creature tokens by sacrificing it, adding CC.
8. Each Writhing Chrysalis you control triggers twice, putting two +1/+1 counters on each of them.
9. Resolve the copy of Ulalek's trigger from step 4, causing you to pay CC to copy the Writhing Chrysalis spell, Ulalek's trigger and Writhing Chrysalis' trigger.
10. Repeat from step 5.

This brilliant loop turns the cascading trigger-copying power of Ulalek, Fused Atrocity into a self-sustaining engine. When you cast Writhing Chrysalis, its cast trigger creates two Eldrazi Spawn tokens that can be sacrificed for the exact colorless mana needed to feed Ulalek's copy tax. By using Strionic Resonator to jump-start the chain, you can endlessly copy both the spell and its associated triggers, flooding the board with copies of Writhing Chrysalis while growing your army to cosmic proportions.