Activate Blasting Station by tapping it and sacrificing Accomplished Automaton.
When Accomplished Automaton dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
When Accomplished Automaton enters, its fabricate ability and Blasting Station trigger.
Resolve the Accomplished Automaton trigger, putting a +1/+1 counter on it.
Resolve the Blasting Station trigger, untapping it.
Resolve the Blasting Station ability from step 1.
Repeat.
This brilliant loop turns a humble automation line into an endless firing squad, fueled entirely by the dual nature of Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight. While Isilu grants your nontoken creatures persist to bring Accomplished Automaton back from the dead with a -1/-1 counter, the automaton's entry triggers its own fabricate ability to place a +1/+1 counter on itself, neatly neutralizing the persist counter through state-based actions. Meanwhile, Blasting Station provides the sacrificial outlet and automatically untaps thanks to the automaton's recurring entries, letting you machine-gun down any target with infinite damage.