ChemiKami is an Augmented Reality card game aiming to introduce chemical elements to students before they are formally being taught chemistry. We designed an avatar representation for each chemical element as well as an application card related to each element. Players can complete the game task by putting the correctly matched avatar card and application card together and having them scanned by an AR device. This game presents several applications of chemical elements in a fantasy setting. Using the idea of employing endogenous fantasy in AR game-based learning, we aim to explore the effect of fantasy on the player’s motivation and working memory. As virtual and game-based learning becomes a leading trend of education, research using ChemiKamiAR helps designers identify the role of fantasy in AR game-based learning.