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 - $3.70
Lightly Played - $3.30
Moderately Played - $2.90
Heavily Played - $2.60
Damaged - $1.80
NM-Mint Non English - $3.70
Lightly Played Non English - $3.30
Moderately Played Non English - $2.90
Heavily Played Non English - $2.60
Damaged Non English - $1.80