The point of all of these artifacts is the fact that most garner card advantage when entering the battlefield, or when they are sent to the graveyard. That means that they replace themselves when you feed the Ravenous Intruder. That just means that you don't just lose if our gremlin friend dies, since he (and the Trafficker) are our primary win conditions.
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It's also in deck description. But ok.
Thx for the advice, but this deck was made for frontier. Frontier is a new format that is being supported by WotC. >.<
Yeah, I wrote in the description that I currently don't have the money for Vial, but it is on my priority list.
IMO allies scale better into the midgame/lategame than Slivers and Merfolk.