Hi Ahaus,
Need Obsidian? Well, this weekend you are gonna have plenty, because from Friday 23th 02:01 Turkey time to Monday 26th 1:59 Turkey time all new Obsidian orders will automatically produce 15% more Obsidian for you! This will apply to new production orders only, so if a production is in progress by the time the event starts you'll have to either cancel or wait until it's complete before you can take advantage of the event. Also note that the effect is accumulative with other items and bonuses (the event will apply even if you already have other Obsidian bonuses).
Have fun, and be sure not to miss it!
Your Tentlan Team
(Can you translate it into turkish? Please send a PM to @Chicahua)