sentences:  Detritus travels to the garrison near the village where Caius Bonus (Crismus Bonus), the garrison's commanding Centurion, explains that the Gauls have a magic potion, which makes them invincible.Detritus decides to capture the potion for himself, and hearing that the clever Asterix and permanently invincible Obelix are the backbone of the Gaulish forces, attempts and fails to eliminate them.A false soothsayer arrives at the village and predicts the arrival of Romans and treasure; despite Asterix's protests, the village believe him, wherefore when a Roman tax collector arrives, they drive off his forces and take the gold.