Your search for "training grounds 155" revealed the following:
Training Grounds - Extended Art (Foil) (MAT) from March of the Machine: The Aftermath, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: A. M. Sartor Card Text:Activated abilities of creatures you control cost 2 less to activate. This...
Training Grounds - Extended Art (MAT) from March of the Machine: The Aftermath, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: A. M. Sartor Card Text:Activated abilities of creatures you control cost 2 less to activate. This effect...