Xorn

Xorn are bizarre creatures from the elemental planes of earth that eat precious metals and other minerals. They have a rock-like consistency, granting an extremely good armour class, and appear to be made of stone. Xorn have a barrel-shaped body, radially symmetrical with three eyes, three arms, three stubby legs, and a powerful mouth set in the top of the creature's body. The stone-like appearance grants the xorn a tremendously good chance of surprising its enemies.

Special Abilities

Immune to fire and cold — Immune to fire and cold damage, and take only half damage from electrical attacks (no damage when saving throws are successful).

Travel through stone — A xorn can swim through stone, but requires a full melee round to enter solid rock, during which time it cannot attack. A phase door spell will utterly destroy a xorn that is travelling through rock or readjusting its composition.

Vulnerability to earth and stone spells — Xorn are particularly vulnerable to spells that affect earth and stone. Move earth spells may be used to hurl a xorn backwards 30-ft and stun them for a full round. Stone to flesh and rock to mud spells weaken the xorn's elemental structure, increasing the creature's AC to 8 until the xorn concentrates for a full round to readjust its composition. Passwall spells inflict 1d10+10 points of damage with no saving throw.