Rust Scarab
CREATURE 5These elementals resemble enormous beetles, with thick outer shells composed of multiple layers of heavily pockmarked, rusted plates protecting a jagged metallic skeleton.
Metal elementals can manifest in a wide variety of different forms, from shapeless amalgams of different metals to humanoid and beast-like monstrosities.
Metal Forms
Though metal elementals are made almost entirely of metal, most are composed of layers of different metals in tiny fragments, as complex as a body of flesh or plant matter. Many of these metals are rusted or decayed from the natural, slow entropy of the Plane of Metal.
As long as it is immobile, the elemental can't be forcibly moved or knocked Prone. If it takes a move action, it loses this immunity until the start of its next turn.
A rust scarab ignores the Concealed condition from rust clouds.
When a rust scarab is reduced to fewer than half its maximum Hit Points or is damaged by a critical hit, its outer shell breaks into a veil of rusty metal flakes. This causes it to lose its resistance to physical damage and its heavy ability, but it gains a rust cloud aura and a 35-foot land Speed.
Medium or smaller, claw, DC 23 basic Reflex
The monster Strides up to double its Speed and can move through the spaces of creatures of the listed size, Trampling each creature whose space it enters. The monster can attempt to Trample the same creature only once in a single use of Trample. The monster deals the damage of the listed Strike, but trampled creatures can attempt a basic Reflex save at the listed DC (no damage on a critical success, half damage on a success, double damage on a critical failure).