Wall of Shards is a uncommon Snow Creature — Wall card from The List (PLST), collector number CSP-23. Current market price: — (foil $6.04), TCGplayer market prices via Scryfall.
Defender, flying Cumulative upkeep—An opponent gains 1 life. (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.)