OH! I see now. You chose the bad ending for the lizard tribe, so you can't progress with it... because they're all horny and feral now. The bad ending isn't really developed yet and the main goal of the event was already achieved here.
You need to complete Curse of Lust Event before unlocking Lizard Treasure Event. I don't remember how I unlocked Orc War event. You complete others existing events 1st, eventually you will unlock new events. Follow The Flow.
