The Devil's Palm has a 1/3 spawn rate in every 10 minutes. It looks outstandingly different to nearby rocks since it has a dark but yellow hue and is taller than the rest. It spawns in the desert with no fixed spot, meaning that it can spawn any where on the desert island excluding the following areas according to my observations: area behind the shops, beside dio's mansion, near Gaster NPC, behind the colosseum or nowhere near it but a good distance away from it.
How to use it
Go near or on the palm and simply just click it while being standless and it gives you Tusk Act 1.
Go to Tusk Act 1-4 to find out how to evolve it.
For People Who Don't Understand,
Devil's Palm Isn't An Item.