Once you've got it all set and equipped, hit "E" to Dark And Darker Gold for sale open your spell wheel. Then, shift the cursor to which one you want. You don't need to click to select. What you hovered your mouse over last is the spell you'll have to equip.
When you're ready a spell, hold that right button. Spells have varying cast times while the more powerful spells require more time to cast. Each spell has a progress bar and before you go in the middle of a run, it's a good idea to experiment with them to check how long they will take to cast.
Spells require the use of knowledge. You start with a base knowledge level of 12, and you can increase the value by using certain pieces equipment you find in Dungeons. Wizards can use Meditate to increase their spell power in the course of. It can take a long time to perform this feat, so make sure you're at the side of an experienced companion or in a secure location while you're using it.
Wizards and Clerics require spell memory, which allows them to access the slots to store your spells. For the Dark and Darker demo, you'll be able to access one spell memory automatically, which lets you have five spells available.
Explore spells and find the ones that suit you most. According to our experience, offensive spells, such as Lightning and Fireball are much better than the typically short Invisibility and other support spells, at the very least for Wizards. Clerics benefit from the added benefit of casting buffs on themselves, which means they are able to resist more severe hits and even deal some damage through their mace.
You can exchange your other skill for one with more spell memory to open five slots more, however we've never had luck finding additional memory yet. It might be locked behind the entire game, much like class expansion is, or might be cheap Dark And Darker Gold a uncommon loot drop.