Crystal Ball is a sorcery and magic themed slot powered by Bally Wulff. Featuring wizards and unicorns, this 5 reel, 5 payline slot comes with a bonus feature that offers 10 free spins complete with bonus transformations that can fill entire reels with the same symbol. Try and conjure up a jackpot from between 5p and £10 per spin.

Visually, Crystal Ball is a pretty basic offering – the lower value symbols are playing cards from A to 10. Joining them are a selection of alchemy related objects. In ascending order of value, you’ll see amulets, bottles of potion, unicorns and a bearded, Merlin-like sorcerer. The wise old wizard is the top paying symbol – 5 in a payline will get you an impressive payout of 1,000 times your stake.

The shimmering crystal ball is both the game’s wild and scatter – it substitutes for all other symbols whenever it hits. Land 3 or more of them on a single spin and you will trigger the Free Games feature and can look forward to a 10 free spins.

Before those free spins play out, 1 symbol will be chosen at random – this mystery object will attain some magical power during the feature and expand to fill up the entire reel in which they appear when 2 or more land. 3 scatters during the feature will give you a further 10 free spins – there’s an unlimited amount of free spins you can win.

Like many a magician’s potion, we found this slot to be fairly volatile – there were lengthy spells when we won very little. These barren spells were punctuated by some impressive hauls of coins, especially via the feature round. You may have to wait a while to trigger it but if you’re lucky enough to land something of high value as your mystery transforming symbol it can be very rewarding.

Crystal Ball is a pretty simple game – the graphics are basic and the soundtrack a generic bang and bleeps affair. The only feature round is the free spins. Again there’s nothing particularly special on offer here. The magic symbol is something we’ve seen in many other slots, especially Novomatic ones.

Considering the magic and alchemy theme, we were expecting something a little more explosive – instead we found it a little dull. If you don’t expect anything too flashy, then Crystal Ball is a perfectly serviceable if not especially memorable slot. I prefer other Bally Wulff titles like 40 Thieves.