Target has their max health lowered by 350/450/550. Unpurgeable. Effect ends at death.
When the target dies, refreshes cooldown of Unending Blight. Casting this spell again removes Unending Blight from the previous target.
Notes: This ability is great for making fragile targets turn into pure glass, and also for making tanks much less tanky. You can use it on an enemy carry to make them way more gankable, you can use it at the start of a fight on a hero want to drop, and so on. This ability does not come off cooldown until the target dies, which balances the fact that it is a permanent debuff.