Casting X spells of any kind, will make 0/0 Hydra creature tokens, and that's the real value here
This makes the existing cards that support one, or more, of these archetype hidden gems
The Mox are exceptionally powerful and because of this, are either banned or restricted in any format theyre legal in
When Oloro is in play, you can also pay one mana to make your opponents lose a life, and you draw a card
The only real drawback to Flesh Duplicate is its Vanishing 3 ability
In addition to that, whenever you deal combat damage to a player with one or more creatures, you get to exile that player's top card face down and cast it while it remains exiled