Wall of Shards is a uncommon Snow Creature — Wall card from Coldsnap (CSP), collector number 23. Current market price: $6.29 (foil $10.06), 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.)