Node Sensitive

(Underdark, page 26, DnD 3.5)

[General]

You can perceive an earth node just by passing near it.

Benefit

You automatically note the presence of any earth node within 30 feet.

Normal

A creature without this feat that comes within 30 feet of the outermost layer of an earth node can make a DC 20 Intelligence check to note the presence of an earth node. A creature with the Node Spellcasting feat can attempt either an Intelligence check or a Spellcraft check at the same DC to notice the node.