Wall of Tombstones

Creature — Wall - (uncommon)

Defender (This creature can't attack.)
At the beginning of your upkeep, change Wall of Tombstones's base toughness to 1 plus the number of creature cards in your graveyard. (This effect lasts indefinitely.)

Price

cardmarket 1.2

tcgplayer 3.46

cardsphere 2.78

cardkingdom 2.49