Customizable blocks

Block can be combined with other blocks to give two Texture in one block. examples include combining two stairs to give a cool texture like using Quartz stairs and adding a mixture of deep slate stair pattern either add the style or mix the colors together. So my idea is to add to ancient cities A rare and powerful new type of tool called the the unity ax with a The new power tool it's should balance you can use but it can not be enchanted or crafted it has to be found in ancient city protect by the The warden.