I returned to the dungeon and decided to test my patience by killing only the fire slimes for a while, allowing me to keep my eyes on the world outside. Thanks to that, Wrath began to steadily level up like before.
After half a day, I reached level twenty-five in the sin of Wrath and obtained the skillskill Field of Hatred. With that skill, all my allies who could use that sin would have the level of their Wrath increased by the same level of the skill. It was a bit boring, but it would be useful since the orcs would become stronger. Besides, the more they fought alongside me and the more there werethere were of them, the easier the skill would level up.
"I guess this is enough for today. In the next battle, we will show those smuggy elves who the boss is."