Magi are able to create things, such as elements like fire and ice and also objects. However, the extent of this depends upon the source of your magic (as each mage is only able to draw from one source). Conjuration is most common in arcane magic, where weapons and tools can be created with arcane magic and behave in whichever way the mage wishes (most can only create an arcane mimicry of something, meaning that it takes the shape but is surrounded by a surreal violet glow and expires whenever the mage can no longer sustain it or dismisses it; experienced conjurers can create permanent items).

From my notes, there is an order of battle wizards who fight utilising a swarm of swords, as an example of conjuration.