Artifact Creature — Wall
Defender,
reach
Whenever
you
attack,
create
a
2/1
colorless
Construct
artifact
creature
token
with
flying
named
Ballistic
Boulder
that's
tapped
and
attacking.
Sacrifice
that
token
at
the
beginning
of
the
next
end
step.
The trebuchets would be destructive enough even without the fire.
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