Your search for "Endangered Armodon" revealed the following:
Endangered Armodon (STH) from Stronghold, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Kev Walker Card Text:If you control any creature with toughness 2 or less, sacrifice Endangered Armodon.
Trained Armodon (6ED) from Classic Sixth Edition, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Gary Leach
Trained Armodon (7ED) from Seventh Edition, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: John Matson
Trained Armodon (Foil) (8ED) from Eighth Edition, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Gary Leach
Trained Armodon (Foil) (9ED) from Ninth Edition, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Gary Leach
Trained Armodon (DPA) from Duels of the Planeswalkers, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Gary Leach
Trained Armodon (TMP) from Tempest, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Gary Leach
Trained Armodon (Foil) (7ED) from Seventh Edition, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: John Matson