Restricted in using it only when you drop that land like Seer's Sundial
It is a royal pain trying to win against that sort of soft lock with a heavy creature deck, particularly one lacking in much instant removal
He's expensive for what he does, and the limitation of only being able to use the mana for artifacts makes little sense in a game where we have Sol Ring, Mana Crypt, Thran's Dynamo, Worn Powerstone, Sissay's Ring, or basically any other colourless mana rock
The only thing you need to pilot this deck well is to be aware of how much damage you can deal on any given turn, and when that damage is lethal
First, you skip your draw step so you'll never naturally draw a card in your life again until this is ended
Hydro-Man is really interesting, because hes essentially a mana-dork in blue