ファイレクシアの魂喰らい/Phyrexian Soulgorger

SnowArtifact Creature - Construct
Cumulative upkeep --- Sacrifice a creature. (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.)

SnowArtifact Creature - Phyrexian/Construct
Cumulative upkeep --- Sacrifice a creature. (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.)