MIRV

MIRV
MIRV grenades are highly effective cluster bombs and explode at a preset time after they are thrown. When MIRV grenades explode, they throw out several more grenades, which subsequently explode. MIRV grenades are highly effective against groups of closely concentrated enemies, and become especially effective when they start boasting an Elemental effect, particularly Shock and Incendiary types.

You can use MIRV grenades to cover a wide area of effect by using them as an 'airburst' grenade; MIRV explode about three seconds after they are thrown, whether they hit the ground or not, so you can throw the grenade higher to make it explode in the air and spread the cluster bombs farther.