Tokkul is a unique currency used in the online game Old School RuneScape. Players can earn tokkul by defeating certain monsters, particularly those found in the TzHaar city of Mor Ul Rek. This currency is primarily used to purchase items from the TzHaar shops, which offer various useful equipment and supplies. One of the notable features of tokkul is that it cannot be traded with other players, making it a non-transferable currency. This encourages players to engage with the game's content and earn tokkul through gameplay, enhancing their overall experience in the RuneScape universe.