I'm really not a fan of most of these cards. (Igni and Scorch are different as they serve kind of a different purpose).I'm so sick of nothing but removal being viable. What is the point of the shield mechanic (and armor whenever they add it) when there are a myriad of "destroy" card archetypes like Geralt, Letho, Igni, Graden, Moreelse, Scorch, etc. Imo the mechanic of "destroy" should be reworked. It makes tanking and protecting your units completely pointless as "destroy" doesnt do any damage it just takes your card off the board. Imo "destroy" should do the amount of damage equal to the target card's current power to remove it, rather than just taking your card off the board.
But Geralt and co, are supposed to counter high value cards or point stacking, not completly remocing a card. I would rather prefer those cards only doing the point removal not the complete removal, by giving cards a status:
Fatal (Status): At turn start, set this units power to 1.
The idea is that this unit is on death's door, no matter what you do. Healing and boosting will only help getting it over 1 more round and the only thing you can do to stop it is purifying it, though that likely means that the enemy might kill it with normal measures.
Moreover, cards like Geralt and co, who will apply this status should have their provisions slightly reduced to balance the change.