Weapons Manufacturing

Whenever a nontoken artifact you control enters, create a colorless artifact token named Munitions with "When this token leaves the battlefield, it deals 2 damage to any target."

Melded Moxite

When this artifact enters, you may discard a card. If you do, draw two cards.
{3}, Sacrifice this artifact: Create a tapped 2/2 colorless Robot artifact creature token.

Memorial Vault

{T}, Sacrifice another artifact: Exile the top X cards of your library, where X is one plus the mana value of the sacrificed artifact. You may play those cards this turn.

Evendo Brushrazer

Whenever you sacrifice a nontoken permanent, exile the top card of your library.
During your turn, as long as you've sacrificed a nontoken permanent this turn, you may play cards exiled with this creature.
{T}, Sacrifice a land: Add {R}{R}.

Daretti, Rocketeer Engineer

Daretti's power is equal to the greatest mana value among artifacts you control.
Whenever Daretti enters or attacks, choose target artifact card in your graveyard. You may sacrifice an artifact. If you do, return the chosen card to the battlefield.