Mikokoro, Center of the Sea has a similar effect to War Room, but it costs one less mana and gives each other player a draw , as well
Affinity is not the most powerful tribal deck but it is very close and has seen more A cube time than any other tribal deck as it has relatively few of the narrow cards that only go in that deck compared to goblins or elves
Whenever you lose life, for each 1 life you lost, exile a permanent you control or a card from your hand or graveyard
Where this deck struggles is consistently hitting the 7+ mana it needs to start dropping multiple wurms per turn
No comment on the 1,000,000,000 life you now have
If the copied creature is copying something else, then the token enters as whatever that creature copied