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.)
NM-Mint - $3.80
Lightly Played - $3.40
Moderately Played - $3.10
Heavily Played - $2.70
Damaged - $1.90
NM-Mint Non English - $3.80
Lightly Played Non English - $3.40
Moderately Played Non English - $3.10
Heavily Played Non English - $2.70
Damaged Non English - $1.90