Xarhrax

Mercenary — Rare — Necrotic Warlock — Underworld

Set: Campaign: Chapter 2
Played in: The Campaign, in your party
How obtained: Primal Dawn Chest (the game's own note)

Default form (level 1)

Health: 18
Hand size: 8

Assimilate - BASIC: Target opposing champion reveals each non-resource card in their hand. Choose a revealed card and put it into your hand.
Mutual Purpose - : Your troops in all zones have +2/+2.
Gathered Proficiency - : Your actions and/or constants in all zones have cost -.

Party passive

At the start of the game, gain a random threshold.

Upgraded form (level 2)

Health: 18
Hand size: 8

What upgrading changes

New
Midnight Hour - : At the start of your turn, put the top card of each opposing champion's deck into your hand.

Upgrade Your Mercenary: how it worked

Complete a Mercenary Challenge node in a dungeon to earn upgrade marks. Earn 2 marks and pay the mercenary’s fee to upgrade them permanently for your account.

Dungeon encounters can now be marked as a Mercenary Challenge. Defeating that encounter with a Mercenary will award bonus gold and grant progress towards upgrading that Mercenary.

The game's own words. The fee was set by the game's server, so its amount isn't in the game files. A mercenary could be upgraded once.

Party passive

At the start of the game, gain a random threshold.

Deck rules

Your deck must contain at least four cards of each shard.

Shard Alignment

Number of each card you can add based on rarity and shard type
Shard	Common	Uncommon	Rare	Legendary
	4	4	4	4
	4	4	4	4
	4	4	4	4
	4	4	4	4
	4	4	4	4
Artifact	4	4	4	4