ReAdd the Elder Prismarine to obtain the desired variant. For example, to obtain Elder Prismarine Brick, simply bake Prismarine Brick in a furnace. This also works with other Prismarine varieties to obtain their Elder variant.
Add more flowers and plants to the sniffer.
Add the Ancient Trees, whose saplings are only found in Ancient City chests, but this time they yield gray wood.
Add terracotta slabs, stairs, and walls (regular terracotta) in all colors.
Charged Creepers drop electric gunpowder upon death. Electric gunpowder is used to craft electric TNT, which is more powerful than regular TNT. To craft it, you need 4 sand and 5 electric gunpowder. When a mob is killed by electric TNT (creeper, zombie, skeleton, wither skeleton, and piglin), its head will drop, but since the charged creeper only drops one mob's head.