Minecraft wiki entry for Defeating_a_bastion_remnant, associated text: Getting to the top can be treacherous though; building to the top carries the risk of being shot off by a crossbow-wielding Piglin (If you've angered them or aren't wearing gold armor) or a Ghast, which can cause you to fall to your death or into lava. Digging through nearby netherrack to the top avoids these threats, but can result in you digging into a lava pocket and getting yourself melted. A Potion of Slow Falling can help protect you from the dangers of building up to the top and a Potion of Fire Resistance will keep you safe from any lava pockets you dig/fall into.