White Dragon Soul Gem

The is a consumable item from Temple of Tiamat.

Once used, unfreezes nearby frozen allies and clears slick ice patches that comes from the white Tiamat head attacks.

Acquisition
drops from one of the 5 summoners in Phase 1 of Temple of Tiamat: Defeat the Summoners.

Cooldown
Base cooldown is 120s, but can be lowered on higher tiers of contributions made by Rewards for the Hoard repeatable quest.