Ivus the Forest Lord is an encounter inside the Alterac Valley set of Mercenary Bounties.
This bounty can be picked up from the Bounty Board and recommends a Party level of 30 to complete it.
You can unlock Ivus the Forest Lord by first completing Balinda Stonehearth.
Completing this Bounty will unlock the Vanndar Stormpike Bounty.
When Ivus takes @ damage, he goes Dormant and summons 3 Treants.
Potential Ivus the Forest Lord Bounty Rewards
In addition to earning Mercenary Coins based on your Party members, Bounties are assigned to specific Mercenaries to allow you to target loot better.
The following Mercenaries can have their loot appear in the Ivus the Forest Lord Bounty: