<p><span style="font-family:Lucida Sans Unicode,Lucida Grande,sans-serif">Yes, these bosses sometimes appear on the portal. <strong>Burster</strong></span><img alt="" src="https://vignette.wikia.nocookie.net/tibia/images/6/6f/Burster.gif/revision/latest?cb=20161119170326&path-prefix=en" style="font-family:"Lucida Sans Unicode","Lucida Grande",sans-serif; height:48px; style="height:48px; width:61px"> appears here :</p><p><img alt="" src="https://www.tibiaqa.com/?qa=blob&qa_blobid=1849069179141888300" style="height:321px; width:436px"></p><p><br><img alt="" src="https://www.tibiabosses.com/wp-content/uploads/photo-gallery/Burster_Grimelip.png" style="height:530px; width:337px"></p><p><strong>Dreadful width:436px"></p><p><img alt="" src="https://www.tibiabosses.com/wp-content/uploads/photo-gallery/Burster_by_Voxarr.png?bwg=1575806880" style="height:657px; width:1200px"><br> </p><p><strong>Dreadful Disruptor</strong><img alt="" src="https://vignette.wikia.nocookie.net/tibia/images/0/09/Dreadful_Disruptor.gif/revision/latest?cb=20190628060010&path-prefix=en" style="height:64px; width:64px"> appears as in the picture below. Unfortunately, I found a photo in low quality.</p><p><img alt="" src="https://www.tibiaqa.com/?qa=blob&qa_blobid=10849263796831747380" style="height:328px; width:600px"></p><p>I src="https://www.tibiabosses.com/wp-content/uploads/photo-gallery/Dreadful_Disruptor_Yagzz.png?bwg=1536730186" style="height:674px; width:1200px"></p><p>I also asked friends who made bestiary in this place, several met Buster in the same place, so I suspect they appear in one place. I will check how I will do the bestiary, if something changes I edit my answer. I hope I helped.</p><p><img alt="" src="https://www.instagram.com/p/B-Zip9Bjx4v/"></p>helped.</p>