Sin, Unending Cataclysm + Intruder Alarm + Blasting Station + Heronblade Elite
Sin, Unending Cataclysm
Intruder Alarm
Blasting Station
Heronblade Elite
Infinite creature LTBInfinite creature ETBInfinite colored manaInfinite creature sacrifice triggersInfinite death triggersInfinite damageInfinite storm countInfinite mana creatures you control can produceInfinite untap of creaturesInfinite commander castsInfinite +1/+1 counters on a creature
How it works
Cast Sin either from your hand or command zone by paying 5 plus commander tax if applicable.
As Sin enters, remove all counters from all artifacts, enchantments and creatures you control, putting twice that many +1/+1 counters on Sin.
When Sin enters, Intruder Alarm and Blasting Station trigger, untapping all creatures and Blasting Station.
Activate Blasting Station by tapping it and sacrificing Sin.
Choose to return Sin to the command zone from your graveyard.
When Sin dies, it triggers, putting its counters on Heronblade Elite.
Resolve the Blasting Station ability.
Activate Heronblade Elite by tapping it, adding an amount of or equal to its power.