Perils of the Past

Not legal in this format after release.

Not legal in this format after release.

Prowess can test the pump as a finisher, while instant artifact removal offers a narrow sideboard role; two mana is a substantial efficiency cost.

Could be wrong if Artifact-heavy decks or a relevant combat-trick shell could make its two modes more valuable than expected.

It is modestly broader than Erode (30) through the pump mode, but two mana artifact hate is inefficient in Legacy and the trick is replaceable.

Could be wrong if A larger artifact presence or a Boros list wanting both effects could justify sideboard copies.

A credible artifact-matchup sideboard card for red creatures, but it is notably weaker than Cast into the Fire (74): destroy is not exile and +3/+2 costs two.

Could be wrong if Artifact recursion and the availability of cheaper pump or artifact-hate effects may leave it without a slot.

Instant artifact removal is useful, but the small one-shot pump has little multiplayer impact and the card is less flexible than broad answers such as Beast Within (66).

Could be wrong if Artifact-dense local metagames could make a cheap, combat-relevant removal spell more desirable.

A +3/+2 instant regularly wins combat or pushes damage, and 11 revealed artifact mentions make the alternate mode plausible main-deck utility.

Could be wrong if Unknown creature sizing, removal density, artifact volume, and format speed could make combat tricks much worse or better.