Luther Rumbleblitz

Mercenary — Uncommon — Dwarf Warrior — Underworld

Set: Campaign: Chapter 2
Played in: The Campaign, in your party
How obtained: Herofall Wheels of Fate (the game's own note)

Default form (level 1)

Health: 24
Hand size: 7
Charges: 1

Destructive Flight - BASIC: Target troop gets Flight, Rage 1, and "When this deals damage to an opposing champion, destroy a random opposing artifact" this turn.
Reconstruct - At the start of your turn, if there are five or more artifacts in crypts, void all artifacts in crypts. Then, summon a Crank Rocket.

Party passive

At the start of the game, a random troop in your deck gets "Deploy - Destroy target artifact."

Upgraded form (level 2)

Health: 24
Hand size: 7
Charges: 1

What upgrading changes

New
Reckless Dismantling - When an artifact is destroyed, deal 1 damage to each opposing champion.

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, a random troop in your deck gets "Deploy - Destroy target artifact."

Deck rules

Can't include Gnolls or Junks in your deck.

Shard Alignment

Number of each card you can add based on rarity and shard type
Shard	Common	Uncommon	Rare	Legendary
	0	0	0	0
	0	0	0	0
	4	4	4	4
	3	3	3	3
	2	2	2	2
Artifact	4	4	4	4