😀 You just need to learn this mechanics "a card with a greater power captures a card with a smaller power" and the goal of a duel (a match) - capture as many cards as you can and create as many trinities as possible. Sign up and learn the rest by playing, constantly looking at Heptagram (when playing on PC, it is always before your eyes in the screen, don't know about mobile).
Thank you!
UPD: I got a comment on Twitter that "Arkhante cards will no longer be obtainable at the end of the season (except secondary market of course)." So, you can win them until October. Not sure that it means the same as it was in Gods Unchained... But... having cards from the first set is anyway cool. 🙂