The Stormjaw Staff is a Pre-Hardmode summon weapon that drops from Stormlions. When used, it summons a miniature Stormlion minion. It runs on the ground and aggressively rams enemies back and forth, does not deal contact damage but creates damaging sparks in contact with enemies. Sparks linger for 2 seconds and partially ignore immunity frames, in a similar manner to the Amidias' Spark.
Its best modifier is Ruthless. The Mythical modifier provides the widest array of stats bonuses, but these primarily affect the initial summon rather than the resulting minion. Additionally, minions cannot deal critical hits. The only significant advantage a Mythical Stormjaw Staff has over a Ruthless one is knockback.