While it isn't especially powerful, gaining two life right away and some more when it chump blocks means it is good enough in a reasonable number of decks
Facilier, Agent Provocateur
If these hubs find their main source of income gone, it will be hard to continue supporting a large travelling circus of tournaments
Bristly Bill, Spine Sower Speaking of cards that manipulate +1/+1 counters for Goldvein Hydra, Bristly Bill is a card that provides constant benefits as soon as hes played, with the ability to pop off late in the game
And the support has been awesome
Assuming you can cast enough spells using that engine, the Ascendancy even provides a possible win condition as that mana accelerant will reach twenty power eventually