The idea behind Fantasy Quest is fairly straightforward: teams choose a 'block' by reading or writing (your choice) a text prompt written on a strip of parchment, then see the hero or monster waiting for them beneath that space. What makes it exciting is the variety of rewards and that each hero and monster is animated to be more dynamic and interesting.
If you want to follow the reading version of the rules, the game proceeds as you might expect, with each team taking turns reading a word or sentence (or whatever text-based prompt suits your lesson) and seeing what hero or monster they'll get.
Things get a bit more chaotic (and, in my opinion, more fun) if you want your students to write: all teams choose which prompt to write simultaneously, then reveal what they have written in turn order. If two or more teams have written the same prompt, each of them will get the same hero or monster. This gets really interesting when two or more teams each get a special hero (like the Thief or the prized Portal Mage), so check the slide notes on the special hero slide for notes on how I manage those situations while keeping the game moving and ensuring a fair experience.
Repeated writing practice is important for my beginner EFL students, but this game template could just as easily be used in a question / answer format where you write the math, science, or social studies questions and your students write the answers.