This is the kind of card that just screams to be
used in a combo. Maybe your creatures have
abilities when you cast them, or when they come
into play or leave play. Maybe they're so big
they don't care about -1/-1, like the Eldrazi.
Maybe you're playing some kind of weird storm
deck that has mostly creatures, like
Kobold-Clamp except, I dunno, different. (Again,
post it on YouTube for us!) It even helps you
when you're re-casting your commander for the
fifth time in a marathon game. There's a lot to
like about this card, and almost not enough time
to build decks around it.
Today's card of the day is Heartless Summoning
which is a two mana Black enchantment that
reduces the cost of creatures you cast by two
and the power and toughness of your creatures in
play by -1/-1. The drawback may seem to be
a big issue, but one or more of these can make
otherwise difficult to play creatures with
valuable effects a major threat early on.
Artifact creatures work incredibly well with
this and other effects can be used to mitigate
the -1/-1 penalty for multiple available themes.
Overall this is a powerful card that will see
tournament play in a variety of builds.
In Limited this can be hit or miss depending on
your pool as you may not have many creatures
that really take advantage of the effect.
Even if you have a worthwhile pool having a
single copy of this will weaken it compared to
Constructed where it can more reliably be drawn
early. It is still somewhat playable and
can be picked first for your collection, but
isn't very likely to make a big impact in your
games. In Sealed the playability depends
entirely on your pool as 2/2 or larger creatures
with three or higher casting costs are best as
support, yet the number available can be quite
low.