A lot of the reason this card got attention is
for the meld mechanic, with good reason - they
have never attempted something like this in a
non-silver-bordered set before, and the
implementation is legitimately interesting (not
to mention much scarier than Unglued's B.F.M).
Yet even without it, Bruna is worth considering
for white decks that can afford her mana cost.
As a commander, she causes incredible problems
for any deck that isn't ready to deal with her -
Reya Dawnbringer and Baneslayer Angel are strong
enough as is, much less when they can't
truly die. She also carries some of the
Angel-Human combined tribal interactions from
the original Innistrad block, and it'll be
interesting to see if any casual deckbuilders
re-examine those after Eldritch Moon's release.
Bruna’s most infamous feature is that she’s part
of one of the three meld pairs in Eldritch Moon,
able to meld with Gisela to form a game-ending
super Eldrazi Angel nightmare. I’m not going to
focus on that, though; I’m going to focus more
on Bruna herself, but know that her position as
part of the best meld pair gives her another use
beyond her front side.
Seven mana is a steep price for a 5/7 flier with
vigilance; it’s not bad, but it’s pretty
underwhelming and the kind of card you’d only
see in Limited. Bruna is also a seven-mana
reanimation spell, though; she can bring back an
Angel or Human (on cast, so no funny tricks
here), which makes for an obvious combination
with Gisela, the Broken Blade. On her own,
though, she’s absurd in Limited, thanks to
avoiding a lot of kill spells and being able to
block almost anything.
Unfortunately, Bruna is seven mana, which makes
her a bit awkward. She gets exponentially better
if you can reanimate Gisela then and there, but
she’s underwhelming otherwise.