Warpstone Flux Rating: ⭐️⭐️⭐️⭐️
3.5/5 stars, rounded up. The rules are good enough and will shine at lower points value games.
It might be second edition, but I still have trouble not calling him "Gregor". Sorry! Geigor is a Thegn of the Space Wolves who has a bit of a history with the Thousand Sons. When fighting alongside them, he lost his war pack and thought to himself that he had been betrayed by his allies. At Prospero, he therefore went a bit zealous with the orders from the Warmaster to execute them all.
Geigor has a praetor like stat line combines with reasonable upgrades (e.g. refractor field) as the Fell Hand - an upgraded frost claw.
Beyond this, he has the Crown Breaker warlord trait which grants preferred enemy to independent characters as well as feel no pain when locked in combat. The movement reaction bonus is great.
The addition of counter attack makes him a great addition to any Grey Slayer or Grey Stalker pack.
A regular praetor is arguably better due to customization ability. He's otherwise a bit bland as per first edition. That said, I don't mind at all.
Worthwhile for lower points value games.
Difference to First Edition.
Gone is the 3+ save and he comes with a 2+ artificer armour save now. This is a massive improvement.