Blizzard has announced several adjustments to the Halondrus the Reclaimer encounter.
Blizzard As soon as we’ve completed our testing, we intend to make the following adjustments to the Halondrus the Reclaimer encounter in Sepulcher of the First Ones:Reduced the amount of damage absorption provided by Reclaim by 20% on Normal and Heroic difficulties. Reduced the amount of damage Reclaim gains periodically from 50% of its initial value to 25% of its initial value on Normal and Heroic difficulties.Reduced the base speed of Ephemeral Motes by 20% on Heroic difficulty. .
Read more on wowhead.com