Increases explosion damage at the cost of a long fuze time. When upgraded, it inflicts damage over time, and the ability cooldown is reduced when a grenade destroys an enemy.

• Effect 1
  Lvl 1: Increases explosion damage from 2500 to 2850.
  Lvl 2: Increases explosion damage from 2500 to 3200.
  Lvl 3: Increases explosion damage from 2500 to 3550.
  Lvl 4: Improves explosion damage from 2500 to 3900.
  Lvl 5: Improves explosion damage from 2500 to 4250.
• Effect 2
  Lvl 1: Places DoT with 100 damage for 5 seconds
  Lvl 2: Places DoT with 150 damage for 5 seconds
  Lvl 3: Places DoT with 200 damage for 5 seconds
  Lvl 4: Places DoT with 250 damage for 5 seconds
• Effect 3
  Lvl 1: Destroying an enemy with Frag Grenade reduces ability cooldown by 20 sec
  Lvl 2: Destroying an enemy with Frag Grenade reduces ability cooldown by 30 sec