In a building shaped like a potion flask, the potion master makes two potions:
1) Speed : This will make the general travel twice as fast (like battle hardened general). If however, he is defeted, he must recover for 8 hours without possibility to use medi kit. When adventure is done, he is immobile for two days. (suggestion: 5 gems is used in the potion)
2) Beserker potion: Will make the soldiers the general uses go beserk: with no regard for their own safety they just storm the enemy. Effectively this means that their HP is halved, but damage is doubeled. (suggestion: 8 gems are used in the potion)