Necrosis - Advanced Difficulty Spike
My friend and I recently fought Necrosis during his event using Advanced rules. We quickly folded and started that fight over with a new team. While he is a 4 difficulty without the event and advanced rules, he is pretty brutal without reliable damage mitigation on Advanced rules.
This is not a complaint. I loved that the spike made us rely on cards we normally gloss over and use different strategies.
If you have not tried that fight, he can pack a wallop!
edit: fixed a typo