Our pre-release judges are divided on the BFZ card “Munda, Ambush Leader.”

Munda, Ambush Leader
2RW
Legendary Creature - Kor Ally
Haste

Rally - Whenever Munda, Ambush Leader or another Ally enters the battlefield under your control, you may look at the top four cards of your library. If you do, reveal any number of Ally cards from among them, then put those cards on top of your library in any order and the rest on the bottom in any order.

The question is this: Do the revealed allies remain revealed as they are put on top of the library, or is the order of the revealed allies in some way hidden before being put back on top of the library? None of us could conjure a precedent for multiple revealed cards being placed on top or bottom of the library as part of one ability, and none of us could find a rules reference to definitively rule one way or the other.

Edit: We were stuck on 701.13a, which wasn't quite getting us there. 401.4 answered solved our dilemma concisely. Thanks Todd Bussey, Chris Nowak, and Oliver Tremel for your guidance and a reminder of how the Q and A forum actually operates :)

701.13a To reveal a card, show that card to all players for a brief time. If an effect causes a card to
be revealed, it remains revealed for as long as necessary to complete the parts of the effect that
card is relevant to. If the cost to cast a spell or activate an ability includes revealing a card, the
card remains revealed from the time the spell or ability is announced until the time it leaves the
stack.

401.4. If an effect puts two or more cards on the top or bottom of a library at the same time, the owner
of those cards may arrange them in any order. That library’s owner doesn’t reveal the order in
which the cards go into his or her library.

Edited John Trout (Sept. 28, 2015 10:08:57 AM)