Elementum is a free print-and-play card game ..
of two mages casting elements on each other to win a duel. You and your opponent keep a hand of 5 elements and a Kill card, and each turn you choose 3 of these cards to play into 2 offensive and 1 defensive slot. Each of you keeps track of your active elements using a simple map of interactions and nullifications.
Your goal is to defeat the other mage by resolving a kill card while your opponent has at least 1 active interaction on them or by activating all 5 of their elements at once.