Sheoldred's TerrorHow it works & interactions with other cards

What It Does

This one-mana black instant allows you to destroy a target creature, provided that creature was not originally printed in an 'Argentum' expansion. The card text explicitly lists these expansions: Mirrodin, Darksteel, Fifth Dawn, Scars of Mirrodin, Mirrodin Besieged, New Phyrexia, and Phyrexia: All Will Be One. If a creature's very first appearance in Magic history was in any other set, it is a valid target for destruction.

Step-by-Step Resolution

First, you cast Sheoldred's Terror and choose a target creature. Upon casting, and again upon resolution, the game checks the 'first printing' status of that card. If the card was first printed in a non-Argentum set (like Alpha, Innistrad, or a Core Set), the spell resolves and destroys the creature. If the creature was first printed in an Argentum set, the target is illegal and the spell will fail to resolve.

Common Mistakes

A common mistake is thinking the specific physical card in play matters. For example, if you have an Ornithopter printed in 'Phyrexia: All Will Be One', Sheoldred's Terror still cannot destroy it because Ornithopter was originally printed in 'Antiquities', which is not an Argentum expansion. Always check the very first set a card appeared in, not the expansion symbol on the card currently on the battlefield.

When to Play It

Sheoldred's Terror is an incredibly efficient removal spell in environments where Mirrodin-themed cards are rare. Since most creatures throughout Magic's history were not printed in the seven listed sets, this acts as a nearly universal 'Destroy target creature' spell for just a single black mana.

Interaction examples

The Terror and the Tutor

Vampiric Tutor

If your opponent has a creature out that was originally printed in a set like Mirage or Visions, you can use Vampiric Tutor to find Sheoldred's Terror and put it on top of your library. Since Vampiric Tutor is not from an Argentum expansion, any creature it might become (in a strange scenario) or any card it searches for is subject to the Terror's logic based on its own origin.

Ritualistic Destruction

Dark Ritual

You can cast Dark Ritual to add three black mana to your pool. You can then use one of that mana to cast Sheoldred's Terror. If the target is a creature like Shivan Dragon (first printed in Alpha), the spell resolves perfectly. Because Alpha is not on the list of Argentum expansions, the Dragon is destroyed instantly.