Cavalier of Night | Glasspool Mimic // Glasspool Shore

Cards

All permanents on the battlefield (
Glasspool Mimic // Glasspool Shore as a copy of
Cavalier of Night).

Activate
Goblin Bombardment by sacrificing
Glasspool Mimic.
When
Glasspool Mimic dies, its second ability triggers, returning itself to the battlefield as a copy of
Cavalier of Night.
When
Glasspool Mimic enters the battlefield, its first ability triggers, choose not to sacrifice a creature.
Resolve the
Goblin Bombardment ability, dealing 1 damage to any target.
Repeat.

This combo has been estimated to be Exhibition (Bracket 1+).