Alabaster Host Intercessor is a common Creature — Phyrexian Samurai card from March of the Machine (MOM), collector number 3. Current market price: $0.18 (foil $0.32), TCGplayer market prices via Scryfall.
When this creature enters, exile target creature an opponent controls until this creature leaves the battlefield. Plainscycling {2} ({2}, Discard this card: Search your library for a Plains card, reveal it, put it into your hand, then shuffle.)