Your search for "Frontier Bivouac 251" revealed the following:
Frontier Bivouac (C17) from Commander 2017, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Titus Lunter Card Text:Frontier Bivouac enters the battlefield tapped.T: Add G, U, or R to your mana pool.
Frontier Bivouac - C17 Reprint (PLST) from The List, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Titus Lunter Card Text:Frontier Bivouac enters the battlefield tapped.T: Add G, U, or R to your mana pool.