Confused about 'Elder Globs'

[Clipper]

I agree with Bampop. The use of 'but' in the card text indicates that it is immune to all Ichor except Ichor which is giving it a combat bonus, and that bonus is doubled.

In other words, the munchkins cannot use Ichors against the Globs, but the Globs can use Ichors against the munchkins, and they do it well.