The Battlefield

Ashnod's Altar
Foundry Inspector
Myr Retriever
Scrap Trawler
AI DraftFeb 26, 2026

Ashnod's Altar + Foundry Inspector + Myr Retriever + Scrap Trawler

Overview
If you sacrifice Myr Retriever to Ashnod's Altar, the creature is sacrificed (it moves from the battlefield to its owner’s graveyard) and Ashnod’s Altar produces {C}{C}. Myr Retriever’s triggered ability triggers and can target another artifact card in your graveyard (it can’t target the Retriever itself). Scrap Trawler’s triggered ability also triggers because another artifact you controlled was put into a graveyard from the battlefield; that ability can return an artifact card from your graveyard with lesser mana value than the artifact that caused the trigger (use the artifact’s mana value as it last existed on the battlefield) [2017-02-09]. Foundry Inspector reduces the cost to cast artifact spells by {1} while it’s on the battlefield; note that once you announce an artifact spell, its total cost is locked in and removing Foundry Inspector after that announcement can’t retroactively change that locked-in cost [2016-09-20].
Step 1
You activate Ashnod’s Altar’s sacrifice ability and sacrifice Myr Retriever. Sacrificing a permanent moves it from the battlefield to its owner’s graveyard , and objects put into graveyards are placed there as described by the graveyard rule . Ashnod’s Altar’s ability resolves and produces {C}{C}.
Step 2
When Myr Retriever is put into the graveyard from the battlefield, its triggered ability triggers: "When this creature dies, return another target artifact card from your graveyard to your hand." The trigger is placed on the stack (you choose legal targets when the trigger is put on the stack). The Retriever’s ability cannot target the Retriever itself because it says "another."
Step 3
Scrap Trawler also sees that "another artifact you control" (the Retriever) was put into the graveyard from the battlefield, so Scrap Trawler’s triggered ability triggers and is placed on the stack. Scrap Trawler’s triggered ability requires a target artifact card in your graveyard whose mana value is less than the mana value of the artifact that caused the trigger (use that artifact’s mana value as it last existed on the battlefield) [2017-02-09].
Step 4
If multiple triggered abilities are controlled by the same player, that player orders them on the stack as they choose. If they’re controlled by different players, active player/nonactive player order applies.
Step 5
As triggers resolve, you resolve them in that chosen order. Myr Retriever’s trigger will return the chosen artifact card (if still a legal target) to your hand. Scrap Trawler’s trigger, when it resolves, will return its chosen target artifact card (if it still has lesser mana value than the triggering artifact’s last-known mana value and is still in the graveyard) to your hand [2017-02-09].
Step 6
If you intend to recast an artifact you just returned to hand, Foundry Inspector’s static cost reduction applies while it’s on the battlefield when you determine total cost during casting ; however, once you announce casting an artifact spell its total cost is locked in, so removing Foundry Inspector after announcing the spell will not retroactively change that locked-in cost [2016-09-20].
Resolution
Sacrificing Myr Retriever to Ashnod’s Altar: you get {C}{C} and Myr Retriever is put into your graveyard . Myr Retriever’s death trigger goes on the stack and may target another artifact card in your graveyard (not itself). Scrap Trawler’s trigger (caused by an artifact you control being put into a graveyard from the battlefield) also goes on the stack and may target an artifact card in your graveyard with strictly lower mana value than the artifact that went to the graveyard; the mana value used is the value the artifact had on the battlefield [2017-02-09]. If multiple such triggers exist (including simultaneous deaths), they can target each other per normal targeting rules and the Myr Retriever ruling about simultaneous deaths applies [2020-08-07]. Foundry Inspector’s static cost reduction applies while it’s on the battlefield and affects the total cost when you determine it while casting; once you announce an artifact spell its cost is locked in and removing Foundry Inspector after that announcement won’t change the cost [2016-09-20].
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