Containment Priest vs. Flickerwisp

A creature that "flickers" under the purveyance of Containment Priest is not going to be able to come back to the battlefield.
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Containment Priest vs. Ichorid and Narcomoeba

Ichorid and Narcomoeba are gonna have a bad time if they try to enter while Containment Priest is around!
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Containment Priest vs. Cascade

Cascade tells you to cast the card you exile, so Containment Priest doesn't interfere.
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Containment Priest vs. Dryad Arbor

Dryad Arbor can never be cast from your hand (or anywhere), so it can never enter the battlefield with Containment Priest around!
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Containment Priest vs. Show and Tell

Containment Priest can only affect things that enter while it's already in play. So anything that enters at the same time, like with Show and Tell, will be able to enter normally.
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Comeuppance + Comeuppance = a drawn game.

Comeuppance can do cool and weird things in combat (and two players with Comeuppance can result in a draw!). Learn about it here!
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Assault Suit – What “can’t be sacrificed” means.

There have been a few cards that prevent sacrifices from opponent's effects, but "can't be sacrificed" is a new ability, so we explain exactly what it means for Assault Suit!
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How Arcane Lighthouse works.

Similar to the Archetype cycle, Arcane Lighthouse removes hexproof/shroud and makes sure it can't be regained this turn!
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The “lieutenant” abilities know about commanders that are face-down or copying something.

A commander by any other name (or status) is still a commander, as far as the lieutenant abilities are concerned.
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You can’t cast Aether Gale without choosing 6 nonland permanents.

If a spell requires 6 targets, you can't cast it without that many targets to choose!
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