The idea is to have a plainswalker your opponents aren't going to want to kill if it gets its final ability off because then the game ends in a drew no matter what.
On the flip side on things you can turn it againt its owner by casting card exiled outside of the game now. So it opens up possibility but it threatens them at the same time. BUT its also just as large a threat to its control as the other guys.
So heres the run down
Turn 1 each player exiles 12 cards from a deck along with what ever is in the graveyards.
turn 2 cast a card from outside the game yours or your opponents
twisted Slower kill spells like dreadbore can now kill him before he pops off his final ability.
Turn 3 now the games been turned upside down and now were forced to play cards from outside the game during this PW's turn or they lose the game. This also works in reverse though if the PW's owner doesn't cast a spell from outside the they lose. Its the ultimate double edge sword.
So give me your impute on this idea please.