Activate Goblin Bombardment by sacrificing Anticausal Vestige.
When Anticausal Vestige dies, it triggers, causing you to draw a card and put Body Double from your hand onto the battlefield tapped. Choose to have Body Double enter as a copy of Anticausal Vestige.
When Body Double enters, Paleoloth triggers, returning Anticausal Vestige from your graveyard to your hand.
Resolve the Goblin Bombardment ability.
Activate Goblin Bombardment by sacrificing Body Double.
When Body Double dies, it triggers, causing you to draw a card and put Anticausal Vestige from your hand onto the battlefield tapped.
When Anticausal Vestige enters, Paleoloth triggers, returning Body Double from your graveyard to your hand.
Resolve the Goblin Bombardment ability.
Repeat.
This clever loop turns a pair of ever-shifting creature copies into a self-sustaining engine of sacrifice and recursion. By feeding either the original Anticausal Vestige or a freshly morphed Body Double into Goblin Bombardment, you trigger an exchange that continuously cycles the two through your hand, battlefield, and graveyard. Meanwhile, Paleoloth acts as the vital glue holding the whole sequence together, watching your heavy-hitting creatures enter the fray and pulling the fallen piece right back to your hand each time the cycle repeats.