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If someone wastes your Helix Pinnacle halfway along the way to blowing it up for the win, all you have done is burn 50 mana
After this, all other opponents must each decide whether to discard a card or allow the player to place a Construct, Robot, or Vehicle card onto the battlefield from their hand
All of these cards drop one or more artifact tokens when they enter the battlefield, and that means that with the flickering cards from Avacyn Restored you can generate many more tokens
It also has cards such as [card]Wheel of Fortune[/card] and [card]Reforge the Soul[/card] that reward players for getting cards out of their hands
All for a cheap four-color cost that, at the time, was very easy to get around to summon it for free