Void Superbuff
I actually imagine that someone else has already made this point/suggestion, but I'm too lazy to look.
Rift Herold can only be killed once, ... fine The new buff is very strong, ... fine It lasts for 20 minutes, ... again, fine It persists through death, ... Here is where I think there should be a tweak
I think it should transfer with death like the current blue and red buffs do. The difference is that it will last for 20 minutes.
This way it can continue to be a contested objective and passed back and forth from team to team.