Well, I've got the basic game figured out.
In the game there are 2 kinds of cards, Charecters, and kanohi.
Character cards are what they sound like. They are your main fighters. they have 5 stats, Elemental energy, mind, strength, defense, and speed. the card also has a small list of archetypes, for example, Teridax's card has the Brotherhood archetype, which means it plays well with other Brotherhood archetypes. While I haven't figured out all of the abilities yet, some cards will have some bonuses, for example, the Mata will have bonuses that they apply to each other when in play together.
Kanohi cards are different, they provide various bonuses and effects, or downsides to the character they are attached to. Some cards provide small bonuses across multiple stats, the Faxon for example. Some provide huge bonuses in one area, like the mask of strength. Some provide even bigger bonuses in return for a drawback in other areas, like the Vahi, which gives you 120+ speed, but at the cost of -40 mind. Some provide effects but no bonuses, like the Huna which renders a character invisible, which means they can't be attacked but can be counterattacked (to even things out, cards like the Rode can circumvent this effect). Some cards give bonuses (or costs) AND effects, such as the Tryna, which brings down Mind by 20, but allows you to revive a dead ally until it, or the character with the Tryna is killed.
The play area looks something like this.
Each player has a 40 card deck, which must contain at least 1 character. Characters can be played from the users hand, onto the playing area where they are played face down. The cards remain face down until they attack or are attacked. Attacks work like this. Each player flips their character over. Both players take the stats, apply the effects of Kanohi, and then compare all of their stats for the two characters, except for Elemental Energy, which is reserved for tie breakers. the losing card and all the Kanohi attached to it are put into the discard pile. To win the game one player must kill at least 12 of their opponents characters (2 benches full) or, the other play must not have anymore characters to play. A player's turn consists of, drawing a card, playing as many characters as they want (up to the 6 allowed on the playing area) and up to 3 Kanohi, and attacking (or not attacking).
I might add locations, but I haven't figured out how to best apply them.