Activate Goblin Bombardment by sacrificing Arashin Sovereign.
When Arashin Sovereign dies, it, Deathrender and Remembrance trigger.
Resolve the Arashin Sovereign trigger, causing you to put it on top of your library from your graveyard.
Resolve the Remembrance trigger, causing you to search your library for Arashin Sovereign and put it into your hand.
Resolve the Deathrender trigger, putting Arashin Sovereign from your hand onto the battlefield, and attaching Deathrender to it.
Resolve the Goblin Bombardment ability, dealing 1 damage to any target.
Repeat.
This delightful loop relies on a clever recursion chain sparked by sacrificing Arashin Sovereign to Goblin Bombardment. When the Sovereign meets its end, Remembrance lets you tutor a copy straight from your deck into your hand, while Deathrender immediately swoops in to cheat it right back onto the battlefield equipped and ready to go. Meanwhile, Arashin Sovereign's own trigger safely tucks itself away, ensuring the creature never runs out of fuel. By looping this sequence, you can repeatedly hurl the Sovereign into the fray to deal infinite damage to any target.