Waxen ShapethiefHow it works & interactions with other cards

Mastering the Mimicry

Waxen Shapethief enters the battlefield as a copy of any artifact or creature you control. This is a replacement effect that happens as it enters, meaning it does not target the permanent it is copying. Because it has flash, you can cast it at instant speed, allowing it to enter as a blocker or to benefit from a 'comes into play' ability at the most opportune moment. If you choose not to have it copy anything, it remains a 0/0 creature and will likely be put into the graveyard immediately unless an external effect boosts its toughness.

Step-by-Step Resolution

First, you cast Waxen Shapethief or move it toward the battlefield via another effect. As the spell resolves and prepares to enter the battlefield, you choose an artifact or creature you currently control. Waxen Shapethief then enters with all the characteristics of that chosen permanent, including name, mana cost, types, and abilities. Any 'enters-the-battlefield' abilities of the copied card will trigger at this time. If the chosen permanent is a double-faced card, Waxen Shapethief only copies the face that is currently up.

Common Mistakes to Avoid

A frequent error is trying to copy an opponent's creature; Waxen Shapethief specifically requires you to control the target. Additionally, remember that it does not copy counters or temporary effects (like giant growth) currently affecting the original card. It only copies the base card as printed or as modified by other copy effects. Finally, note that if you use its Cycling ability, you discard the card to draw a new one; you do not get to put the creature onto the battlefield when cycling.

When to Play It

Use Waxen Shapethief when you have high-value utility creatures or artifacts with powerful passive effects. Because it has Flash, it is excellent for responding to removal spells targeting your other permanents—while it won't save the original, it ensures you maintain the board presence of that specific ability. It is also a great mana sink for late-game scenarios where you need to cycle through your deck to find a win condition.

Interaction examples

Ramping with the Simulacrum

Solemn Simulacrum

With Solemn Simulacrum on the battlefield, you cast Waxen Shapethief. As it enters, you choose to copy the Simulacrum. The Shapethief enters as a Solemn Simulacrum, and its 'enters' ability triggers, allowing you to search for a basic land. Since it is a perfect copy, it will also allow you to draw a card when the Shapethief eventually dies.

Doubling Down on Types

Roaming Throne

If you control Roaming Throne, you can cast Waxen Shapethief to copy it. As the Shapethief enters as Roaming Throne, you choose a creature type (such as Golem). You now have two Roaming Thrones. If another Golem's ability triggers, each Throne will add an additional trigger, resulting in the ability triggering three times total.