White-backed artist proofs are printed by Wizards of the Coast and are only issued to the artist. Only 50 of each card are produced. Many of my popular cards have been completely sold out long ago. The front of the cards are printed as normal but the backs are unprinted/only white. They are unique collectible items and highly sought after by some.
Each card comes signed by the artist. The prices are dictated by popularity, rarity, and inventory--as stock reduces, prices go up on remaining cards.
Casting Cost: 2
Card Text: Cumulative upkeep 2
If Heart of Bogardan's cumulative upkeep cost is not paid, Heart of Bogardan deals damage equal to its last paid cumulative upkeep to target player and each creature he or she controls.
Oracle Text: Cumulative upkeep 2 (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
When a player doesn't pay Heart of Bogardan's cumulative upkeep, Heart of Bogardan deals X damage to target player and each creature he or she controls, where X is twice the number of age counters on Heart of Bogardan minus 2.
Artist: Terese Nielsen