To get your Tattoos, you need to go in the Tattoo & Rune Map in NosVille to craft the scroll related to the Tattoo you want.
There are 5 Tattoo Scrolls : Bear, Snake, Lion, Eagle Loa & Corrupt Shadow Tattoo Partern.
Each of them gives different Tattoos.
After crafting the scroll you want, you need to "Receive" this scroll in the second tab of the NPC. It will give you a random Tattoo from the "type" of the scroll you used.
If the Tattoo you received doesn't suit you, you can go in the third tab of the NPC, and simply use the Tattoo Removal button to get a new one.
You can upgrade your Tattoos to +9 maximum. It will increase the values of your Tattoo options. You can use the NPC to upgrade your Tattoos but you also have Tattoo Safeguard Scrolls. They prevent you from a possible downgrade of your Tattoo.
Using Increase Tattoo Preset will increase the amount of presets you can have on your character. Making swapping between tattoos much easier. This item can be obtained in Voidshop.
Loa Switch Crystal
Using Loa Switch Crystal on an existing Tattoo will give you a option to choose a different Loa. When selected, a random Tattoo of the chosen Loa will be given. This item can be obtained in Voidshop.
Tattoo Switch Scroll
Using Tattoo Switch Scroll on an existing Tattoo will give you an option to choose a Tattoo of the same Loa. This item can be obtained in Voidshop.
warning
Note that you can't have the same Tattoo twice, this includes Tattoos on another preset.