A seismic wand is an off-hand Magic item. It has a very rare chance to drop from Vorago.
The seismic wand will degrade each time you successfully hit an enemy with the wand equipped. It will last around 60,000 hits on a full charge.
It can be repaired both by NPCs - such as Bob (from Bob's Brilliant Axes) - or in a player-owned house armour stand, with the repair cost proportional to the damage taken, at a rate of 30K for each 1% of damage it has sustained (for a total cost of 3 million coins when fully degraded). When repaired by a player, this cost is reduced based on the player's Smithing level, with the cost halved when the player has 99 Smithing.
As with other degradeable gear, the seismic wand can only be traded when fully repaired.
If acquired when CoinShare is active, you will be given an equal share of 120 seismic wand shards, 120 of which combine to make a seismic wand.