The first 13 cards of the card mark mechanic series are now complete.
The card mark mechanic revolves around the idea of placing a "mark" on cards in players' decks, hands, and fields.
The mark can be visible as a glow around the card.
Marks placed by you would cause a green glow, marks placed by the opponent would place a red glow, and if the card has been marked by both players, it would glow yellow.
Although thus-far, no cards make use of which player marked a card, this is in place for future cards if the current idea works out.
Have a card marked, in and of itself, does nothing. The mark is only a means to let the cards of this series interact with the marked card.
The 'double edge' concept is also a key theme. E.g. Having a marked card can be both a good thing and a bad thing depending on what cards your opponent has that interact with marked cards.
For example, the..element card in this series boosts damage dealt by all marked cards. This means that your marked creatures, spells, etc. will deal increased damage. However, if your opponent is also marking their own cards, then any cards that they have marked will also benefit from the damage output boost.
In most cases, cards are only marked while they are still in a players hand or deck. However, a card will maintain its mark when it moves from one location to another. E.g. if you draw a card that was marked, it will still be marked in your hand, and (for creatures and permanents) it will be marked when it enters play.
When an ability or effect creates an 'exact copy' of a marked card (e.g. parallel universe) the copy will also be marked. However, other cards, (like fractal and mitosis) will not create marked copies.
If a card is changed from one type to another (e.g. mutation and flying weapon) the card will still retain its mark.
When a card is selected to be 'marked' priority is given to cards that neither player has marked, followed by cards that the current player has not yet marked. If there are no cards that have not been marked by the current player, then no card will be marked.
INTERACTION WITH IMMATERIAL CARDS: As a primary distinction of this mechanic, cards in this series which affect 'Marked' cards (creatures or permanents) will also affect immaterial cards that have been marked. Note that for this to function, the immaterial creature or permanent would have to be marked BEFORE entering play. E.g. an immaterial card that is already in play is safe from being marked and thus safe from the effects of these cards. This goes for both buff-like and CC-like effects. For thematic purposes, the 'Card Mark' acts as a beacon which transcends space, time, and all dimensions, thus allowing cards which interact through them to locate and affect normally 'untargetable' creatures and permanents.
Currently, the series has 13 cards total. One for each element, including the type 'Other' element. I would encourage other users to add to this since this mechanic requires a large number of cards that interact with it in order to promote the impact of the 'double edge' balancing feature.
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