My favorite thing about the Sunsinger is that
you only need three mana to power her up, unlike
the other domain creatures in Conflux (also the
artwork). In not too long a time, there will be
many fewer multilands in Standard, which means
that she'll become a little harder to use
effectively in constructed, but there's always
the kitchen table. She can even have an impact
in multiplayer, provided one or more of your
friends managed to put theirs in a deck. And in
limited, a tempo creature that can become 5/5 on
command is nothing to laugh at.
Constructed:
It is a good thing that they did not make it
Tribal. That would be overpowered. But it only
pumps up it's brothers or sisters and no others
makes it, well, not that great.
Casual:
This would be a fun card to stick on a Soul
Foundry. Or use Kiki-Jiki.
Limited:
A 2/2 for 2 mana is okay, but the chances of
getting at least one more copy in sealed and
draft are very high. It would still be hard in a
all Conflux draft too.
