Apius Acrimonium

The foot long stinger and venom sack of the monstrous Rage Wasp. When stabbed into the body, an affected creature takes 1d4 piercing damage and 2d4 poison damage. If the target survives, it then flies into an unstoppable rage for 30 minute.  Every turn they must make a DC15 Wis save or immediately attack the nearest living thing until it dies. Every round they manage to not attack something, the DC goes up by 1, resetting upon failure. When the rage subsides, the creature immediately takes two levels of exhaustion.