Sure thing, not a problem.
so the trick is all in the
lumbering battlement, by using 3 of them, you can cycle the
wall of lost thoughts in and out of play.
so you have the wall in play.
next you play battlement(1) and
exile the wall.
next battlement(2) comes into play and
exile battlement(1). the wall comes back into play.
play battlement(3) and
exile battlement(2) and the wall. battlement(1) comes back into play.
battlement(1) will
exile battlement(3). battlement(2) and the wall return to play.
battlement(2) exiles battlement(1) and the wall. battlement(3) reutrns to play.
this cycles will continue until your opponent is milled out, 4 cards at a time. the glorius part is that unless your opponent counters the initial playing on the wall or the battlements, the cycle will never end, because they are all ETB effects. so there are no triggered abilities or activated abilities to counter even.