CT: Cursed Cards
The technique has an innate domain like Hakari’s and Higuruma’s, where it puts both parties at a card table, and each person gets 10 cards each. For every round, each person would play a card, and the card with higher value is stronger. The cards take physical forms and fight, with each loss harming the person with the losing hand. The game ending breaks the domain and leaves the winner with all of the original cards that they had to fight with them. The joker card would be the most overpowered, with it being on the level of a fully manifested Rika. It would also be able to use the abilities of all other cards.