Tempest is Matthias's custom-built longbow, created by Gordon Fink during their stay in Charouse. It is of a similar height and shape of other Avalonian longbows, but it is unique for its steel plating and reinforcement. It is much heavier for that fact, but it benefits for being able to stop bladed weapons, and having a much more powerful draw.
Tempest, being a much stronger draw than a normal longbow, requires the wielder to take a raise to fire at any target. However, due to the increased speed and strength of the bow, the carry-over for additional dramatic wounds from an attack is lowered from 20 to 15.