One Hydra Allowed (EDH / Commander) [Revisione 15]

What if Zaxara only has options to Draw, Remove and Counter with X, with no creatures costing X. So, this is a deck where only one Hydra lives.

One of the two Auras on Zaxara result in infinite colored mana. Freed from the Real and Pemmin's Aura. Combined with any draw X spell you pretty much win the game. If you don't want that, replace those two auras with some cards from the Maybeboard.
Notable cards winning the game with infinite mana:

• Drain two players with Profane Command or drain every opponent with Exsanguinate
• Gain infinite life with Erebos's Intervention
• Gain control of all creatures with Mass Manipulation
• Mill one player with Drown in Dreams or even funnier with Villainous Wealth, casting all their cards and then let them die on their draw
• Make opponents draw their deck --- you get the gist

To not overly rely on that combo, some evasion pieces are there to make combat damage wins viable as well.
The lands are overly basic to keep the price down and make Nexos a great ramp piece. If you replace the basic lands, cut Nexos!

Notable exclusion are token / counter doublers/tripplers since I find them boring. I'd rather have more evasion than fatter hydras. Nothing is more deflating than having a 40/40 hydra being blocked by a 0/1 plant.