Mortuary + Experimental Frenzy + Myr Moonvessel + Goblin Bombardment

Mortuary

Experimental Frenzy

Myr Moonvessel

Goblin Bombardment

How it works

1. Activate Goblin Bombardment by sacrificing Myr Moonvessel.
2. When Myr Moonvessel dies, it and Mortuary trigger.
3. Resolve the Myr Moonvessel trigger, adding C.
4. Resolve the Mortuary trigger, putting Myr Moonvessel on top of your library from your graveyard.
5. Resolve the Goblin Bombardment ability, dealing 1 damage to any target.
6. Cast Myr Moonvessel from the top of your library by paying 1.
7. Repeat.

This loop turns the humble Myr Moonvessel into a recurrent ammunition for Goblin Bombardment, letting you ping any target an infinite number of times. The secret to sustaining this firing squad is Mortuary, which intercepts the dying automaton and neatly places it back on top of your library instead of letting it rest in the graveyard. From there, Experimental Frenzy bypasses your hand completely, granting you the crucial permission to cast the artifact creature directly off the top of your library using the mana generated by the Moonvessel's own death trigger.