Verloren uses a dual staff, which is considered one of the strongest types of arcaster (magic weapon thing), although it's also somewhat harder to use than a standard staff. It requires its user to be very good at managing their magis as they need to maintain balance between both focal crystals instead of channeling everything into a single one. But typically, having two focal crystals allows it to amplify spells to a greater degree than a standard staff could, and if its user is particularly skilled, they can even cast two different spells simultaneously, which can be useful.

Dual staves are also really good at keeping up a magic shield while you charge up something else to attack with. Verloren uses that strategy a lot in duels.