We are close to publishing the major update including area spells.
Those will be based on the fire element for now and can be learned after getting enough experience. Another big change coming soon is the ability to acquire elven bows in the shop. Specifically for this purpose, the orcs will (occasionally) carry some gold with them and drop it upon their death. Expect the bow to be rather expensive, so you will need to kill lots of orcs to afford them.