I have never used any hero exept capt. Anya Weston or sir Tharin Thunderfist, thus I can’t deffinitely say, is Nalfar Cryptor worth his price. But… But I can say, that necromancers are the toughest guys on Cavern Survival, they are real headache and pain and nightmare) 20 of leaders from both teams on the leaderboard consist of quite much quantity of necromansers. Six of 10 blue team leaders are Nalfars now, and three of 10 - in the red team. Maybe only Ritic the Cold is as much powerful as Nalfar, I think it’s not seen by leaderboards because there is not so much Ritics in the game.