Drycha Un-killable Tree (90% resistance to everything)

Rat-ee-jiK#7094

https://youtu.be/fN_HjVuNgBM

Aic#3164

Oh the real fun part is that you can get all her regular treemen units up to 36% physical resist and 60% missile resist (and some 150 armro), as well as with poison and a mortis effect. .With the right Aspects, tech and lord aspects and redline skills.

It's worth noting though that Spell resistance no longer protects agains magic melee or missile attacks.