Minecraft wiki entry for Advancement_guide, associated text: Now is the moment to start getting the effects: go to a pillager outpost and kill a captain to get Bad Omen, trigger a raid, defeat it and get Hero of the Village, then return to the outpost to get Bad Omen again. From now on you cannot enter any village. Make sure your hunger bar is at most 18/20 and prepare in your hotbar a pufferfish, a blindness suspicious stew (crafted with an azure bluet), a golden apple and a bucket of milk. Now get to your contraption, go over the trapdoor and open it to be in water (this will grant Conduit Power), as soon as the elder guardian curses you with Mining Fatigue eat the pufferfish, close the trapdoor to enter the crawling position, sprint swim towards the grindstones to get on top of the wither rose, as soon as you see the dolphin's grace icon in the top right corner quickly eat the suspicious stew and the golden apple. As both the shulker and the spectral arrow will have already hit you as you eat the golden apple you will be rewarded the advancement. Having all these effects applied at once can be dangerous so drink milk to get rid of them.