Start by having Yumina use the Rescue Staff once again to get Maric out of
the way. Move everyone down the stairs and have someone in range of the Worm
Priest, so that Elren can come down to go after you. As soon as he gets by you
be sure to wait until Turn 10 so that the thief with the Silver Card will
appear. The thief will not show up if you do this glitch trick too early.
If Elren stops coming preferabley have gotton out of the Worm Priest' ranges
of the Worm spells then this glitch trick will not work and you will have to
begin the chapter all over again to try this again.
Anyway once eventually Elren gets to Wendel keeping out of his range next
Turn have Wendel speak to him to have him realize the errors of his ways.
Once that he joins your cause the troops mysteriously will come after you
without attacking you, because of Elren being recruited. They may be good guys
now but go ahead and begin picking off these enemies with your weakest units
as this will be some of the easiest EXP that you will ever get. Kill the Thief
with the Silver Card with Maric/Elren. This thief needs to die. Seriously,
because you really will want that item that he is holding as YOU REALLY WILL
WANT TO GET THIS.
Anyway, once that the card is yours kill the remaining squadren then collect
the treasure and have Marissa use the Thief Staff to collect the treasures
that are not attainable without it otherwise. Having Marissa using the Thief
Staff makes some really cool music the same that it does when you use these
other staves that you get here! This is in fact one of the juicest tunes in
this wondeful game. GO NINTENDO & INTELLIGENT SYSTEMS GO. Anyway back to the
victory music now. Once that you are finished collecting the treasure have
Marth conquer the Khadain throne to hear a story Gato tells then the next
chapter shall begin now.
This should solve the problem.