If you're on the offensive, this is an amazing
card. Of course, its power is largely determined
by how the board looks and how profitable
attacks you can make, but getting to swing twice
in a turn gives you a great chance to deal lots
of extra damage, or power through blockers.
Remember, damage wears off at end of TURN, so if
your opponent blocks with the same Wall twice,
it can be destroyed by a creature not normally
big enough to kill it in one shot. And then
World at War rebounds and you get to do it
again! Granted your opponent sees it coming this
time, and is more likely to have his defenses
bolstered, but by this time it's probably too
late-- he threw away his chump blocks, took too
much to the dome, and didn't get to attack you
back because he was fearful of your Beta Alpha
Strike.
I remember Relentless Assault. It was a fun card
to play around with, and did really funny things
with the likes of Goblin Lackey, among others.
Since World at War is two Relentless Assaults
for the price of one, it's not hard to imagine
how you could set up a sequence where the
opponent basically has to end the game on their
turn, or be completely overrun. It's also great
for multiplayer, where you can use the double
attack phase on two different people.
Today's card of the day is World at War which
for one extra mana is Relentless Assault for two
of your turns instead of one. This is a
very powerful effect that will often win a game,
but is slightly weaker over the course of a
longer game when compared to the similar Waves
of Aggression.
In Limited this is absolutely a first pick in
Booster and with any kind of field presence
should put you into the lead towards a swift
victory.
Green creatures with Trample or anything with
Flying are very effective when given multiple
attacks and should be considered when running
two colors in Sealed or while drafting. An
otherwise easy to overlook card like
Battle-Rattle Shaman is also drastically
improved by using the effect for each combat
phase and obvious choices like Traitorous
Instinct are devastating. Another option
is using Raid Bombardment combined with several
small creatures, even Eldrazi Spawn tokens,
which can also make a drastic impact with the
extra attacks.