Their Ability, Violent Appetite, lets their trainer heal them for 60 HP when discarding a pokemon card from one's hand, allowing Naganadel & Guzzlord to stay on the field even longer than normal
For Psykers who can manifest 40k's equivalent of "magic", this represents additional physical peril
Ancient Tomb adds two generic mana when you tap it, and it deals two damage to you, which isnt bad at all
MAKE THE READS TO MAKE THEM BLEED Theres a tendency to think of blue permission decks as the most cerebral of Magic strategies, but I think that black discard decks are an even better fit for players who like to outwit their foes
Endure can be part of an enters ability, like on Dusyut Earthcarver, or it can be an ability that cares about when your other creatures enter (creaturefall) like Warden of the Grove