Edelweis is a tool crafted using 2 blaze rods, 1 Xarbalyyth on top of that and two redstone, each next to the Xarbalyyth. Typically, what the Edelweiss does is it will strengthen blocks when you right click on them. It has two modes, temporary and permanent. Temporary will make the block right clicked hard for only 15 seconds but will not use any durability. Permanent hardening will make the block right clicked hard forever but will take up 1 durability. The block hardened will have 2.5 times blast resistance and mining resistance.