Lord Jaraxxus

Identity: A Demon-tribe economy hero who opens the Nether Portal with accumulated damage and then gets two Demons every turn.

Profile

Trait: Passive “Bloodfury” opens a portal to the Twisting Nether once your minions have dealt 150 total damage, replacing itself with “Nether Portal”: at the start of each turn, get 2 random Demons. Buddy “Kil’rek” is a Tier 3 3/6 Demon with Taunt and Deathrattle: get a random Demon (two when Golden). This hero starts with 15 Armor.
Mechanics: Damage progress carries across the whole game, so the earlier the portal opens, the more Demons you collect; those cards are both hand resources and Demon-comp components.

Early game: Favor minions with high attack frequency that keep dealing damage so the 150-damage counter fills fast. Don’t force Demons immediately — push the counter first.
Key turns: Once the portal is open, use the two Demons each turn for economy and triples, keeping any that can become your core. If your board isn’t a Demon comp yet, treat them as temporary strength or sell them for Gold.
Mid to late game: Build around Demon scaling and Deathrattle synergies; “Kil’rek” is both a Taunt and a steady Demon source. With two free cards every turn your hand stays full, so convert that into board with refreshes and Tavern spells.

Two random Demons every turn is lasting economy and hand advantage, and the earlier the portal opens the more it pays.
Demons come with built-in synergy, so the Buddy and the portal reliably assemble Demon cores and triples.

Before the portal opens the Hero Power provides nothing; if damage progress is slow, your mid-game lacks the resources other heroes have.
A flood of random Demons eats hand space and turn time, and can clog you when they don’t fit the comp.