Paradox EngineHow it works & interactions with other cards

What It Does

Paradox Engine features a single, potent triggered ability: 'Whenever you cast a spell, untap all nonland permanents you control.' This means that as long as this artifact is on the battlefield, every card you play—whether it is a creature, an instant, or another artifact—acts as a signal to reset your nonland cards. This includes mana rocks, utility artifacts, and creatures with activated abilities.

How It Resolves Step by Step

The sequence is crucial for gameplay. First, you announce a spell and pay its costs. Once the spell is cast, Paradox Engine's ability triggers and is placed on the stack on top of that spell. The untap effect resolves first. This happens even if the original spell is later countered or removed from the stack. Because it resolves before the spell that triggered it, you can use the newly untapped permanents to generate more mana or activate abilities before your original spell even finishes resolving.

Common Mistakes

A frequent error is trying to untap lands with this effect. Paradox Engine specifically states 'nonland permanents,' so your lands will remain tapped. Additionally, players often forget that the trigger happens upon casting, not upon the spell entering the battlefield. If you cast a creature and it is countered, your other nonland permanents still untap because the 'cast' action was successfully completed.

When to Play It

Paradox Engine is best utilized in decks with many 'mana rocks' (artifacts that tap for mana) or creatures with powerful tap abilities. It is a 'build-around' card that excels when you have ways to draw cards and cast multiple spells in a single turn, creating a loop where each spell provides the mana needed for the next.

Interaction examples

Drawing Through the Deck

The One Ring

With both permanents on the battlefield, you can tap The One Ring to add a burden counter and draw cards. When you cast any other spell from your hand, Paradox Engine's ability triggers. Before your new spell resolves, Paradox Engine untaps The One Ring. You can then tap The One Ring again in response to your own spell to draw even more cards, potentially finding another cheap spell to repeat the process.

Mana and Ramp Efficiency

Solemn Simulacrum

If you have several artifacts that tap for mana, you can tap them all to add mana to your pool. Then, use that mana to cast Solemn Simulacrum. Before Solemn Simulacrum enters the battlefield, Paradox Engine triggers and untaps all those mana artifacts. You now have your mana rocks ready to use again, and when Solemn Simulacrum eventually resolves, you still get to search for a basic land to put onto the battlefield.