Magic blunt weapons.
RCV: Clay Golems are highly maigic resistant, you will have to lower
that resistance before spells become a viable option.
As to weapons, only blunt ones [like maces, flails, staves, morning
stars, et al] will do any damage, and I believe +2 or better are needed - it
may only be that they must be magical, ie +1, but I think its +2. But
certainly, arrows, swords, spears, etc will do no damage no matter what
their "plus"....
Rich
I'd be prepared to bet that the +2 weapons you're using against him
are sharp - swords, axes, halberds, etc. Clay golems are immune to such
weapons: only a BLUNT weapon will hurt him. Use a mace, quarterstaff,
flail or morning star, or similarly blunt weapon.
Jonathan.