Sorcery
Exile
all
opponents'
graveyards.
You
may
cast
spells
from
among
those
cards
this
turn,
and
mana
of
any
type
can
be
spent
to
cast
them.
At
the
beginning
of
the
next
end
step,
if
any
of
those
cards
remain
exiled,
return
them
to
their
owners'
graveyards.
Exile
Mnemonic
Betrayal.
