The only thing that keeps him from being one of the most powerful creatures of all time is that most multiplayer games these days start with enough life to essentially half his power and usefulness
(Choose any number of permanents and/or players, then give each another counter of each kind already there.)
Kamigawa, more than any other plane, had something to lose, and with a risk comes a corresponding reward
Its worth noting that this mechanic is restricted to once per opponents turn, meaning it gets better in multiplayer Magic and your opponents know the maximum amount of value you can accrue
Shining Draw X SPELL To activate this card, you must draw it for your normal draw in your Draw Phase, reveal it, and keep it revealed until the Main Phase 1
More cards, more players, the only thing that's not more than the Magic you're used to is you only get one of each card (excepting basic lands, of course) meaning your deck can be less consistent than what you're used to