Activate Adarkar Valkyrie by tapping it, targeting another nontoken creature you control.
Activate Blasting Station by tapping it and sacrificing the creature targeted in step 1.
When the creature dies, Adarkar Valkyrie triggers twice.
Resolve the first trigger, untapping Adarkar Valkyrie.
Resolve the second trigger, returning the sacrificed creature from your graveyard to the battlefield.
When the creature enters the battlefield, Blasting Station triggers, untapping Blasting Station.
Resolve the Blasting Station ability from step 2, dealing 1 damage to any target.
Repeat.
This ingenious loop transforms Adarkar Valkyrie into a relentless engine of recycling by pairing her delayed-return trigger with the sacrifice-and-untap mechanics of Blasting Station. When you sacrifice your chosen creature to fuel Blasting Station's damage ability, Adarkar Valkyrie's targeted ability intercepts the death event to immediately return that creature to the battlefield. That new entry triggers Blasting Station to untap itself, and because the Valkyrie's trigger actually creates *two* delayed returns, the entire sequence neatly resets both permanents for another iteration. While Thornbite Staff is also present in the list, the core of this loop relies entirely on the continuous sacrifice and resurrection cycle between the Valkyrie and the Station to melt your opponents' life totals away.