When Leonin Relic-Warder enters, its first ability triggers, exiling Rescue Skiff.
Activate Goblin Bombardment by sacrificing Leonin Relic-Warder.
When Leonin Relic-Warder dies, its second ability triggers, returning Rescue Skiff from exile to the battlefield.
When Rescue Skiff enters, it triggers, returning Leonin Relic-Warder from your graveyard to the battlefield.
When Leonin Relic-Warder enters, its first ability triggers, exiling Rescue Skiff.
Resolve the Goblin Bombardment ability from step 3.
Repeat from step 3.
This brilliant loop turns a simple mechanical ping into an endless cycle of reincarnation, powered by a self-sustaining loop between Leonin Relic-Warder and Rescue Skiff. As Leonin Relic-Warder continually enters the battlefield to exile the Spacecraft, sacrificing it to Goblin Bombardment triggers Rescue Skiff to return it straight back to play. Because Rescue Skiff itself triggers its own resurrection ability every time Leonin Relic-Warder frees it from exile, Goblin Bombardment can repeatedly hurl the cat soldier at your opponents for an infinite stream of damage.