Like most Pokmon cards, the value of Poliwrath depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (HSUnleashed)
Of course, Blossoming Tortoise is also fine in Commander, especially if you care about milling cards, and could see play in specific land-oriented strategies that care about the cards various abilities
This creates a neat dynamic where you have to be careful not to destroy Endrek Sahr as you create tokens
However, we have a robust amount of acceleration with: Sol Ring, Mana Crypt, Mana Vault, Wily Goblin, Solemn Simulacrum, and Nykthos, Shrine to Nyx
Gitaxian Probe You may think that [c]Gitaxian Probe[/c] costs one mana, but in the vast majority of circumstances, youll want to play it for zero mana and pay the two life instead
Every fifth copy of a common or uncommon card you open in packs (since having more than five of any card has no effect on deckbuilding) fills up the Vault, and once it reaches 100% completion it can be opened to redeem three Uncommon Wildcards, two Rare Wildcards and a Mythic Rare Wildcard