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
  Increases explosion damage from 2500 to 2850.
• Effect 2
  Inflicts damage over time: 100 damage for 5 sec.
• Effect 3
  Destroying an enemy with Frag Grenade reduces ability cooldown by 20 sec.