Sink into the floor. Sink.
The Legendary Grenade Mesmer is manufactured by Vladof and comes from the Borderlands 3 Director's Cut - Upgrade Pack.
All enemies damaged by the grenade fight on your side for 10s.Enemies fighting on your side gain increased damage.
Grenade is thrown in an arc.It immediately explodes on impact.
All of Mesmer's farming Sources:
The Mesmer is a Datamined Legendary Grenade Mod and can not be obtained legitametly. The Save Editor is the only way to get the Mesmer.