the valknut- vikings painted this on their shields to call the Valkyrie to take them to Valhalla if they were killed, Jake had this tattooed on his forearm in honor if his viking decent/roots. Along with some ancient runes.
Not many could withstand what I do! If you can deal with what most couldn't, without turning to pills, liquor, pot or any kind of drugs! Then that makes you a warrior! Only the weak turn to those things to cope with reality!