Caidence277's page

Only a minor necro'ing, looking at this thread's history ;) but check this out.

Thunder and Fang:

Benefit: You can use an earth breaker as though it were
a one-handed weapon. When using an earth breaker in one
hand and a klar in your off hand, you retain the shield bonus
your klar grants to your Armor Class even when you use it to
attack. Treat your klar as a light weapon for the purposes of
determining your two-weapon fighting penalty.

Normal: An earth breaker is a two-handed weapon,
preventing the use of a klar in one hand without imposing
penalties for using the earth breaker one-handed. A klar
can be used either as a one-handed weapon or a shield; it
does not grant a bonus to AC during rounds in which it
is used as a weapon.

Perhaps, since this is a much later and smaller book it was just sloppy writing, but...

An earth breaker is normally a two-handed weapon,

preventing the use of a klar in one hand without imposing
penalties for using the earth breaker one-handed.

Even for RAW fans, this seems to imply that, without this feat, the earth breaker's a two-handed weapon but you can use it, in combat, one-handed, by taking penalties.

My next thought is, as far as a Jotungrip oversized-limb tiefling goes, unless there's a listed definition for the term "appropriately sized," since such a tiefling can wield Large weapons without penalty they are appropriately sized... :D go monkey go monkey go!