Activate Blasting Station by tapping it and sacrificing Glasspool Mimic.
When Glasspool Mimic dies, it triggers, returning itself from your graveyard to the battlefield as a copy of Vesperlark.
When Glasspool Mimic enters the battlefield, Blasting Station triggers, untapping itself.
Resolve the Blasting Station ability from step 1, dealing 1 damage to any target.
Repeat.
This elegant little loop turns Vesperlark's leaves-the-battlefield trigger into an endless engine of destruction, fueled entirely by the clever use of Glasspool Mimic. By casting or copying the Mimic as a Vesperlark, its power of 1 or less satisfies the resurrection requirement, allowing it to constantly pull itself back from the graveyard whenever it leaves play. Meanwhile, Blasting Station acts as both the executioner and the reset switch: its sacrifice outlet triggers the Vesperlark loop while dealing a point of damage to any target, and its passive ability untaps itself every time a new creature enters the battlefield.