Where Solar Light deals with damage over time and fire, Arc deals with burst damage and lightning and Void deals with areas of effect and black holes, Entropic Light would deal primarily with support effects and ice

Examples:

Entropic Warlock - Timebinder

Grenades:

Slow Grenade - Throw a grenade that creates a slowing field(similar to the bombs in Prison of Elders) and deals Entropic damage on explosion.

Rift Grenade - Throw a grenade that creates a circular area that deals Entropic damage over time.

Accelerator Grenade - Throw a grenade that accelerates the speed of recovery, movement and weapon handling for all allies within an area.

Melee:

Cryoblast - Base. Deal heavy Entropic damage and stagger a Minion of Darkness.

-Cold Wind - Cryoblast becomes a 90-degree cone, centered on your target.

- A Crisp Morning - Killing an enemy with Cryoblast reduces the cooldown of all allies nearby.

-Time Rip - Cryoblast's cooldown is extended, but killing an enemy with it creates a zone where enemies are slowed.

Super:

Double Vision - Base. Create a clone of yourself from another timeline. This clone stands still and fires at the closest enemy with your primary weapon. You cannot be harmed until the clone is destroyed or expires, and any damage you take is transferred to your clone.

-Time Compression - You can take damage, but your clone cannot. Instead, your clone stands beside you and mimicks your actions perfectly.

-Foretelling - If one ally nearby dies while Double Vision is active, your clone dies instead and that ally is fully healed.

- Time Freeze - Your clone can move and only melee, but radiates an aura that slows all enemies nearby.