Buyable Tattoo's

Don't think I've ever got one of these? Do they crumble on death or what's up with em?

Yes, they crumble.

I got the one that's good for ninjas on my ninja.

You should try to identify them.

Do they actually do anything useful uh?

depends on what you find usefull...

They increase abilities.

That'd be a good thing to have up on the wiki I think. They were a good implement.

We are talking about the tattoos in Miruhvor, right?

Yup

I got the one that's good for ninjas on my ninja.

Makes sense..

Most of them are quite useful for up to midlevel characters, depending on player style even at 50.