Shaker orb

A round small glass orb with a faintly shining liquid. It is commonly used by miners to create cave-ins.

A shaker orb is used to collapse cave tiles. It is sold by traders around the lands of Wurm for 5 silver coins. It is a one-use item.

Shaker orb can instantly collapse a single cave tile. It can be used both inside a cave to collapse a tile underground, as well as on the surface to close a cave entrance.

Cave tiles that are reinforced by support beams CAN NOT be collapsed due the supported tile not being empty. Tile being supported is full of rock. The cave tile next to a supported cave tile can be collapsed. This does not remove the support beam from the supported cave tile. The cave tile with support beams is still there, and when the cave tiles next to it are mined out, the support beamed tile will still be there with the support beam intact.

On usage you get the message: "You throw the shaker orb on the ground. The earth suddenly shakes and the rock falls in!".

Strongwall is a Magranon spell that has similar effects.