Refresh Mana

Refreshing Mana Crystals is the refilling of a player's empty Mana Crystals, thus restoring their mana. This effect is distinguished from gaining new Mana Crystals: refreshing the player's mana only refills existing Mana Crystals, and does not grant new ones.

Strategy
Refreshing the player's Mana Crystals acts to counter the mana expended in playing the card, effectively making the card free to play, provided the player has enough mana to play it in the first place.

Mana Refreshing can also be thought of as an alternate form of cost-reduction, as compared to the effects of Kalecgos or Kael'thas Sunstrider.

Patch changes

 * When refilling an existing mana crystal below 10 mana, you now receive a temporary mana crystal instead. This fixes an interaction where Forest Warden Omu would not grant the correct amount of mana.
 * Example: The player has 6 Mana Crystals and plays a 6-mana Forest Warden Omu. Next, The Coin is used, gaining 1 temporary Mana Crystal, but Forest Warden Omu's effect will refresh only the remaining 5 empty Mana Crystals.