| Mana Recovery |
マナ回収 (Mana Kaishū)
In the Water Civilization, it is often unrestricted to the type of cards that can be returned to your hand, while Nature cards are limited to only creatures, and Light cards are limited to only spells.
|Water / Spell / 4|
| Shield trigger (When this spell is put into your hand from your shield zone, you may cast it immediately for no cost.)
■ Return up to 3 cards from your mana zone to your hand.
|Water / Creature / Earth Eater / 4 / 5000|
■ When you put this creature into the battle zone, return a card from your mana zone to your hand.
■ This creature can't attack.
While it can be seen as disadvantage to reduce the number of cards in your mana zone, it can be used to return high-cost cards put into your mana zone during your early turns to be played later and to replenish your hand. As you are choosing cards from a public game zone, it can be seen as more efficient than a regular draw.
If a card such as Ochappi, Pure Hearted Faerie or Shrine of Rebirth is used to put a card from your graveyard into your mana zone, combining it with Mana Recovery cards can be seen as a pseudo-graveyard recovery of cards.
Cards such as Sol Habaki, Apocalyptic Sage or Hurricane Crawler that swap cards between your hand and mana zone can put the cards into your mana zone untapped, allowing them to be used for the cost of another card.
List of Mana Recovery cards