freyar
Extradimensional Explorer
A haun is only capable of a slow slither. However, once per turn it can compress its body, and release enough energy to leap up or forward. In this manner, it can leap forward up to 18 feet (3d6 feet) or upward up to 9 feet (1d6 +3 feet). A haun can burrow through ice at half its normal slithering speed.
Maybe this doesn't seem so psionic after all. Want to borrow leap from the cave locust? We can go with 20 ft horizontal or 10 ft vertical.