Globe of Invulnerability.

[reload]

It's overpowered. It only drains about 10-15 adrenaline/sec, but with an Energy Acid gun + 5 it'll never run out. I beat one game by myself in 1 hour ( I was idle for like 20 min though).

http://imgur.com/a/fAm7I

[iRobot]

Whoa sick score m8!

But maybe this is just a case of it being OP while solo. In a group game, would you manage to maintain enough adrenaline to keep it active?

[Jester]

It reminds me of the old protection enchante from EMWM who gave 100% protection.

@reload having a permanent protection with Invulnerability artifact only works with few weapon (I just remember acid/firestorm and maybe skrith blaster). The others weapons do less damage or don't work on some monsters because of their armor.

@iRobot you can have a permanent protection with or without people in the game. Just run into a group of monsters and all of them'll stay near you. You just need resupply ability and it's done.

[Calypto]

The adrenaline drain is fine. Most weapons with even +12 energy will not be able to sustain the invulnerability.

[Nuclearbass]

The adrenaline drain is not fine.
During most wave from 9 to 16, you can easely stand in fight with rage/vorpal/energy leech with permaglobe during the entire wave.
(just have to back for ammo with lightning gun uh?)