The endgame currency, and the only one you cannot buy — every Ruud on SilverMU comes from killing something, finishing an event, opening a box, resetting, completing a Guide Quest or levelling the MU Pass. It buys sealed Blood Angel gear and the anvils and souls that upgrade it.
The cash-shop currency. You earn it for every minute online, per kill from bosses and elite monsters, for winning events such as Blood Castle, Devil Square, Chaos Castle and Crywolf, and from the Icewind Valley and Guild Battle pools, and you spend it in the in-game Cash Shop. It is also the currency player-run personal stores are priced in.