You suggest destroying the box the exact same way you defeated the Ogre Shamans in Watchtower: using a potion. Head to Yanille and OSRS gold make a potion just like the one from Watchtower, that is, with guam foliage, jangerberries and bat bones. Though I do not know what order you make it because it DOES matter. When you've created the potion, take it to the Watchtower Wizard and request him to enchant it. You will get an Anti Dalgroth Potion(3). Head to Dorgeshkan and bank for a Massive battle. Inform Oldak you're prepared, and he'll direct you to his portal machine. The box will explode.
It appears to be a thumping, just in a blueprint, like marching.... Into the portal! This world may have lifetime after all, and it seems like really major life at that!
If you are thinking about if the Ork Shaman has anything to do with an Ogre Shaman, I'll be blunt: yes. After 15 seconds, he'll become aggressive, and hit 60s. If you turn on protect from mage, you won't have to worry about him. Just use a second dose of your potion on the Shaman and he'll get hit for 100 and die. Then switch to protect against melee and cope with the Orks themselves. When they're dead, you will return to Dorgeshkan.
That was close! Well, Bandos has no grip over Yubiusk anymore, but it is still a barren wasteland. I don't know a lot about Yubiusk, but if we did ever live there, I understand we would not put up with cheap RuneScape Mobile gold those creatures. So, if we could pursue out the Orks and redecorate the area, Yubiusk may be nice again?