Less mana, ideally, and you lose the ability to loop the artifact, but in decks with high-power creatures, youre talking controlling a player for as little as 3 mana
At local game stores, like Stormcrow Games in Lubbock, there are limits set for how many packs individual buyers can purchase because they just run out so quickly
Secondly, you can use it to cycle artifacts in and out of the yard those with death or enter triggers, and those that affect all players on upkeeps
While there are benefits to focusing on a win condition that ignores life totals, this is typically a slow process
So while this is cool it looks like it is beaten out again by too many similar alternatives
Or, you could even use the Magikarp card from Wisdom of Sea and Sky along with the Will Supporter card to not take any damage in the next turn and farm more Energy in the process