Bank
| Bank | |
|---|---|
| Keyword Ability | |
| Type | Static |
| Introduced | Mystery Booster |
| Last used | Mystery Booster |
| Reminder Text | Bank (If you cast this card from your hand, exile it until the end of the match. You may cast it from exile during another game this match. It still counts towards your deck minimum.) |
| Statistics |
1 card  100% |
| Scryfall Search | |
| keyword:"Bank" | |
Bank is a keyword ability that allows a player to save up a card for a next game within a match. If a card with Bank is cast from your hand, it is exiled until the end of the match. The player may cast it from exile during another game during the match. It still counts towards the deck minimum.
This might be interesting for a Control player, which can have a weaker game one in a lot of matchups. After sideboarding, game two can be played with an added advantage. It also makes the deck more efficient by making it one card smaller, but still counting.
The mechanic appeared on a test card in the Mystery Booster set.
Example
Example
Memory Bank 
Sorcery
Draw a card.
Bank (If you cast Memory Bank from your hand, exile it until the end of the match. You may cast it from exile during another game this match. It still counts towards your deck minimum.)