Fiend Hunter enters the battlefield, triggering its first ability, Blasting Station and Verdant Sun's Avatar.
Resolve the Blasting Station trigger, untapping it.
Resolve the Verdant Sun's Avatar trigger, causing you to gain life equal to Fiend Hunter's toughness.
Resolve the Fiend Hunter trigger, exiling Phyrexian Delver until Fiend Hunter leaves the battlefield.
Activate Blasting Station by tapping it and sacrificing Fiend Hunter.
Fiend Hunter leaves the battlefield, triggering its second ability, returning Phyrexian Delver from exile to the battlefield.
Phyrexian Delver enters the battlefield, triggering itself, Blasting Station and Verdant Sun's Avatar.
Resolve the Blasting Station trigger, untapping it.
Resolve the Verdant Sun's Avatar trigger, causing you to gain life equal to Phyrexian Delver's toughness.
Resolve the Phyrexian Delver trigger, returning Fiend Hunter from your graveyard to the battlefield and causing you to lose three life.
Repeat from step 2.
Resolve all Blasting Station abilities, dealing infinite damage to any target(s).
This loop relies on an endless cycle of resurrection between Fiend Hunter and Phyrexian Delver, where each creature enters the battlefield to pull the other back from exile or the graveyard. Blasting Station acts as the crucial sacrifice outlet that triggers this chain reaction while converting the constant movement into infinite damage to your opponents. Meanwhile, Verdant Sun's Avatar ensures that every single creature entry cushions your life total against the life-loss cost of the Delver.