man the soulkeeper is actually anti-mage(furion brother)but he been prison coz take the orb of kiljaeden(kiljaeden give) after he take the orb he is transform into soul keeper...then in frozen throne..he got prison by warden( phantom assasin)
but when potm n furion going to wake the druid of claw(syllabear) the potm enter the prison n release the illidan(soul keeper) ...the story still long....