Nothing could be worse than the surprise of a Witchery Ent.
SURPRISE!!! have a large angry incredibly tough tree that would really love to plant you!
and might well succeed 200 or 240 health is a good start, as is a longer reach than you, as is a reasonably hard hit, my poor Cleetus (Adv Thaum Golem plating\visor\mace\launcher\fez, air, earthx2 upgrades) got into a fight with an Ent and pretty much got his arse handed to him just couldn't overcome the reach advantage and this is a golem that can take on a wither boss.
Though now I must slaughter Dryads ... you know what you've started here, don't you?