NAP controls Containment Priest and Nature's Revolt. AP tries to play a land. The question is whether the land is exiled by Containment Priest.

After some discussion with another judge I went to Comprehensive Rule 614.12:
“Some replacement effects modify how a permanent enters the battlefield. (See rules 614.1c–d.)
Such effects may come from the permanent itself if they affect only that permanent (as opposed to a
general subset of permanents that includes it). They may also come from other sources. To
determine which replacement effects apply and how they apply, check the characteristics of the
permanent as it would exist on the battlefield, taking into account replacement effects that have
already modified how it enters the battlefield (see rule 616.1), continuous effects generated by the
resolution of spells or abilities that changed the permanent’s characteristics on the stack (see rule 400.7a), and continuous effects from the permanent’s own static abilities, but ignoring continuous
effects from any other source that would affect it.”

From that, I would say the lands are not exiled because Nature's Revolt falls into the last category: any other effects are ignored.

Containment Priest
Creature — Human Cleric
Flash
If a nontoken creature would enter the battlefield and it wasn't cast, exile it instead.


Nature's Revolt
Enchantment
All lands are 2/2 creatures that are still lands.

Edited Douglas Isenberg (Dec. 10, 2014 03:55:53 AM)

Nope, they aren't exiled. When we're performing the enter the battlefield event, we apply replacement effects (like the Priest has), then we apply continuous effects (like the Revolt). When we check to see if the Priest's effect would apply, the lands are not creatures yet (since we haven't apply the Revolt's effect yet), so the Priest doesn't apply. Then we apply the Revolt's effect, and then the land enters the battlefield.

In short: the lands will enter the battlefield like normal.

Nathan Long
Wizards.Com Boards NetRep