Electrum is one of the two currencies used on World of Umbria. The other currency is Platinum. Electrum is earned by interacting with a creature (such as feeding it), selling items, and trading. You can buy creatures and items with Electrum.
Site Definition Edit
"The most common of the two currencies that Umbria carries. Electrum can be earned via interacting with other player's creatures and eggs. Sometimes items can be sold back to shops for a fraction of their cost for electrum as well. Other ways to earn electrum is through the player based marketplace that deals with selling and trading creatures as well as items since the shop will not always carry the items some players are looking for."