Sin, Unending Cataclysm + Intruder Alarm + Blasting Station + Kami of Whispered Hopes

Sin, Unending Cataclysm

Intruder Alarm

Blasting Station

Kami of Whispered Hopes

How it works

1. Cast Sin either from your hand or command zone by paying 5 plus commander tax if applicable.
2. As Sin enters, remove all counters from all artifacts, enchantments and creatures you control, putting twice that many +1/+1 counters plus one due to Kami of Whispered Hopes on Sin.
3. When Sin enters, Intruder Alarm and Blasting Station trigger, untapping all creatures and Blasting Station
4. Activate Blasting Station by tapping it and sacrificing Sin.
5. Choose to return Sin to the command zone from your graveyard.
6. When Sin dies, it triggers, putting its counters plus an additional +1/+1 counter on Kami of Whispered Hopes.
7. Resolve the Blasting Station ability.
8. Activate Kami of Whispered Hopes by tapping it, adding an amount of or equal to its power.
9. Repeat.

This loop transforms the continuous commander tax of casting Sin, Unending Cataclysm into a lethal engine by leveraging the explosive enter-the-battlefield synergy between Intruder Alarm and Blasting Station. As Sin enters the battlefield, its replacement effect strips counters to grow massive—a growth further amplified by Kami of Whispered Hopes, which ensures an excess of +1/+1 counters and fuels a massive mana pool when you tap Kami for its ability. Blasting Station then dispatches Sin to the graveyard so you can send it right back to the command zone, while Intruder Alarm untaps your entire board in response to the commotion. When Sin finally perishes, its death trigger dumps its colossal pile of counters back onto Kami of Whispered Hopes, allowing you to repeat the cycle infinitely to blast down any target.