So recently, Ravnica Allegiance spoiled the card, Biomancer’s Familiar:
This card reduce the cost of creature activated abilities by 2 mana, reducing it down to 1 mana. It also allows creatures to adapt more than once. Because of the first ability, many players begin to comment that this would be Training Grounds with legs. (A creature version)
Because Biomancer’s Familiar is a creature, there is a variety of ways to fetch it. The most common one is with Duskwatch Recruiter. Duskwatch Recruiter can dig through your library to find Biomancer’s Familiar, while Biomancer’s Familiar reduce Duskwatch Recruiter‘s activated cost. Now, that’s value.
The best thing about Biomancer’s Familiar and Training Grounds deck is that you can abuse the combo in many different ways. Sam’s first deck focus on infinite +1/+1 counters, while the second deck generates infinite mana with Walking Ballista as the finisher.
In my case, I threw in a bit of everything:
Since this deck is in bant color and requires colorless mana, a lot of color fixing is required. To satisfy this, Birds of Paradise and Noble Hierarch works as mana fixer as well as mana ramp for all the shenanigans. Because a lot of the creatures in this deck has Human subtype, Cavern of Souls help fixed the mana as well as provide colorless mana to Eldrazi Displacer. Meanwhile, Ghost Quarter can destroy opponent’s key lands and generate more mana for Eldrazi Displacer.
As for sideboard, we have Path to Exile as well as Journey to Nowhere. The advantage of Journey to Nowhere is the ability to target cards such as Emrakul, which cannot be killed by conventional removal spells.
I also included more shenanigans such as Herald of Anafenza that pumps itself while generating a token, as well as Ghost-Lit Warder that acts as a recurring Mana Leak. Fauna Shaman allows you to tutor creatures by discard a creature card from your hand, which can then be retrieved with Eternal Witness.
To make the deck more budget, you can replace Cavern of Souls with Unclaimed Territory. While you do lose the ability to protect creature spells, the essential functions are still more or less intact. Meanwhile Oath of Nissa is a possible, though inferior, substitute to Noble Hierarch. Instead of a direct mana fix, Oath of Nissa allows you to dig for your fetchlands and shocklands while giving you the option of digging for creatures as well.