Has very high health, a crushing attack, fast attack speed, and decent range. However, it has a laggy attack animation, making it difficult for it to advance. Oh, and she also survives a lethal strike, but... that's not even remotely a problem.
Due its fast attacks, attack range and its area attack, it can kill your cats easily, so bring a lot of types of meatshields to fight her, also bring fast-attacking cats for attack her.
Or instead of fast attackers, bringing slow but strong attackers with meatshields can deal with her too.
Madam the Savannah
Time between attacks
270 (area attack)
Survives a lethal strike (100%);
Multi-hit: Attacks 3 times, deals 4800, 4800, and 4800 damage