The way priority works, it is close to a free win if done properly (and you manage to defend, of course).
1. Play this artifact on opponent's priority (after ramping to 12 resources)
2. Next turn activate the ability. (I assume exile in this case means remove from game)
3. Even if your opponent pays the 10 resources to destroy the card, the 100 hp and 100 morale loss comes first due to priority.
Perhaps wreckful walrus or a luckily-timed growth can destroy this. Aside from that, it can be an instant win condition.