NINJA MASK is made by splicing THE DARKNESS and BLACK BLOCK. NINJA MASK is in face category. Plant it and come back tomorrow, unless you want to spent ridiculous amount of spray. If you brake this all night long you will get some experience points. How many times you need to hit it? Head to the wiki for more info: <a href="https://growtopia.fandom.com/wiki/Ninja_Mask">ninja mask</a> You get at least 1 seed back (maybe more!) from splicing NINJA MASK. Will you strike it rich? You just have to count the gems yourself. Will you get enough blocks to build something? You just have to find out yourself.