You get favor points for items you can unlock.
So they can range from plus mana or health per second or give or buff your current abilities.
Each demigod can gain xp through killing things.
Usually the idea is to either kill the enemy demigod or easier is killing the enemies peons that spawn wave after wave.
As you gain xp you can choose what abilities the demigod gains with each new level. I have noticed that they break this down into 5 categories. Health, attack, control, defend and depending on what role the demigod is the 5th is kill more or interrupt.
These skills change according to what you want to do with the charchter in game. Sit back and D or go into the maw of the enemy and kill, kill and kill some more. Sure you can do both... but usually that works out badly especially if the other guys team has players filling specific roles.
Kill, D or just control the map and win through attrition.
Wow...didn't think I thought that much about demigod.
Pear, dude, we seriously got to play online this Friday. Say around 7pm central?