AI DraftFeb 26, 2026
Foundry Inspector + Krark-Clan Ironworks + Myr Retriever + Scrap Trawler
Overview
With Foundry Inspector, artifact spells you cast cost 
less while it’s on the battlefield. Krark‑Clan Ironworks is a sacrifice outlet that adds 
when you sacrifice an artifact. Myr Retriever’s death trigger returns another target artifact card from your graveyard to your hand. Scrap Trawler’s trigger (when it or another artifact you control is put into a graveyard from the battlefield) returns an artifact card from your graveyard with lesser mana value than the artifact that caused the trigger. You can sacrifice artifacts to Krark‑Clan Ironworks to get , and the two triggered abilities (Myr Retriever and Scrap Trawler) can be ordered on the stack and resolve to return artifacts to your hand; however Scrap Trawler’s return is limited to artifacts with strictly lesser mana value than the artifact that went to the graveyard, and Foundry Inspector’s cost reduction only applies while it’s on the battlefield and cost locking rules apply when you begin to cast a spell .
less while it’s on the battlefield. Krark‑Clan Ironworks is a sacrifice outlet that adds when you sacrifice an artifact. Myr Retriever’s death trigger returns another target artifact card from your graveyard to your hand. Scrap Trawler’s trigger (when it or another artifact you control is put into a graveyard from the battlefield) returns an artifact card from your graveyard with lesser mana value than the artifact that caused the trigger. You can sacrifice artifacts to Krark‑Clan Ironworks to get , and the two triggered abilities (Myr Retriever and Scrap Trawler) can be ordered on the stack and resolve to return artifacts to your hand; however Scrap Trawler’s return is limited to artifacts with strictly lesser mana value than the artifact that went to the graveyard, and Foundry Inspector’s cost reduction only applies while it’s on the battlefield and cost locking rules apply when you begin to cast a spell .Step 1
Start with Foundry Inspector, Krark‑Clan Ironworks, Scrap Trawler, and Myr Retriever all controlled by the same player (Scrap Trawler and Krark must be on the battlefield to use their abilities) .
Step 2
Activate Krark‑Clan Ironworks’s ability by sacrificing an artifact you control. Sacrificing moves that artifact to its owner’s graveyard immediately .
Step 3
When the artifact is put into the graveyard from the battlefield, Scrap Trawler’s triggered ability triggers; if the sacrificed artifact was Myr Retriever, Myr Retriever’s own triggered ability (it died) also triggers [Ruling 2020-08-07][Ruling 2017-02-09].
Step 4
Put triggered abilities on the stack in the order you choose; each will resolve in last‑in, first‑out order. Scrap Trawler’s ability can only target an artifact card in your graveyard with a strictly lesser mana value than the artifact that caused the trigger (use that artifact’s mana value as it last existed on the battlefield) [Ruling 2017-02-09].
Step 5
If Myr Retriever’s death triggered, its ability targets another artifact card in your graveyard and will return that card to your hand when the ability resolves; the Myr’s ability has no mana‑value restriction but it does say “another” and can target an artifact that died at the same time as the Myr [Ruling 2020-08-07].
Step 6
After the triggers resolve you may cast returned artifact cards from your hand as artifact spells; Foundry Inspector reduces the mana cost of artifact spells you cast by only while it’s on the battlefield, and the casting steps and cost are locked in per the casting rules .
only while it’s on the battlefield, and the casting steps and cost are locked in per the casting rules .Step 7
You can repeat sacrificing returned artifacts to Krark to generate , but Scrap Trawler forces the returned artifact to have strictly decreasing mana values relative to the artifact that was sacrificed, so without additional cards (e.g., artifacts with mana value 0 or other cost reducers) the four cards listed alone do not create an infinite mana loop.
, but Scrap Trawler forces the returned artifact to have strictly decreasing mana values relative to the artifact that was sacrificed, so without additional cards (e.g., artifacts with mana value 0 or other cost reducers) the four cards listed alone do not create an infinite mana loop.Resolution
You can use Krark‑Clan Ironworks to sacrifice one of your artifacts (for example, Myr Retriever or Foundry Inspector) to produce . That sacrifice will trigger Scrap Trawler (if it’s on the battlefield) to return an artifact card with strictly lesser mana value than the sacrificed artifact [Ruling 2017-02-09]. If Myr Retriever died as part of that event, its own triggered ability can target another artifact card in your graveyard and return it to your hand (it says “another” but can target an artifact that died at the same time as Myr) [Ruling 2020-08-07]. Foundry Inspector makes artifact spells you cast cost less while it’s on the battlefield, but that reduction is only relevant when you actually cast a spell and the cost is locked in per the casting rules; opponents can’t try to remove Foundry Inspector after you’ve announced the artifact spell in order to change the locked‑in cost [Ruling 2016-09-20]. This arrangement does not produce infinite mana by itself because Scrap Trawler requires strictly decreasing mana values for its returns and Myr’s return is subject to being “another” artifact and timing of triggers; you cannot loop back to produce more usable mana than the cost of replaying the artifacts without some additional zero‑or‑one mana artifact or cost reduction beyond what these four cards alone provide.
. That sacrifice will trigger Scrap Trawler (if it’s on the battlefield) to return an artifact card with strictly lesser mana value than the sacrificed artifact [Ruling 2017-02-09]. If Myr Retriever died as part of that event, its own triggered ability can target another artifact card in your graveyard and return it to your hand (it says “another” but can target an artifact that died at the same time as Myr) [Ruling 2020-08-07]. Foundry Inspector makes artifact spells you cast cost less while it’s on the battlefield, but that reduction is only relevant when you actually cast a spell and the cost is locked in per the casting rules; opponents can’t try to remove Foundry Inspector after you’ve announced the artifact spell in order to change the locked‑in cost [Ruling 2016-09-20]. This arrangement does not produce infinite mana by itself because Scrap Trawler requires strictly decreasing mana values for its returns and Myr’s return is subject to being “another” artifact and timing of triggers; you cannot loop back to produce more usable mana than the cost of replaying the artifacts without some additional zero‑or‑one mana artifact or cost reduction beyond what these four cards alone provide.Feedback