Zaxara (EDH / Commander)

The main strategy is to try and get either Pemmin's Aura or Freed from the Real onto Zaxara which will give you infinite blue mana. Then you should have a number of ways to win against one or more opponents. For example Villainous Wealth or Profane command will kill a single opponent but you will need Torment of Hailfire or Exsanguinate to clear a full table (unless of course you have lithoform engine out). Zaxara's ability that creates a hydra on cast helps you seal in a board state advantage even if your giant spell is countered. From there you could always sacrifice your giant hydra to altar of dementia or drop a herald of secret streams and attack with a 1000/1000 unblockable. There are a few other sneaky on the board win conditions such as: Viridian longbow, Walking Ballista, Hangarback walker, hydra broodmaster. The deck is still very powerful without the infinite mana cards and can certainly win without it. Sometimes I will take them out if I am looking to play a game that is more focused on big hydras and less anxiety inducing for my opponents and also want to be less of a board threat and try and get a sneaky win. I just throw a couple sweet cards from other decks in their place and it normally runs fine, especially because people are less hellbent on removing Zaxxy the moment he enters if they know he wont potentially kill them instantly.
Don't be afraid to use cards like torment of hailfire as midrange to get board advantage even when playing with the combo pieces in. There are are plenty of ways to win and you'll be swinging with big bodies.