In the Mythic Destiny Archfiend there is a level 18 mythic feat named Profane Bargain.
The feat grants the archfiend the ability to make a deal with a target, one specific thing for a wish. That wish's limits are defined as: "If the request could be granted by a wish ritual, you spend 1 Mythic Point and the request is magically granted."
This is a 3 action cost and nothing is expended besides the agreed upon cost for the wish. This sentence makes this sound as if the spending of the mythic point and the cost of 3 actions is all this takes. No check. No possibility of failure. Just done. While the ritual it references has a scale of success and failure. But the mythic ability makes no reference to a check at all. Merely if it CAN be accomplished by the ritual, it IS.
This has some implications depending on how willing your party is to trust this player to get a wish, but apart from the roleplaying consequences I'm not missing anything here right? Your whole party can get a single wish per player with the exception of the archfiend, and the archfiend can just use a single mythic point to make the wish happen in 6 seconds?
3 actions, 1 mythic point, no hostile actions against you, to never lie to you, to never speak of this bargain, and to either perform, or refrain from performing, one other specified task. = 1 wish per player with no checks? Am I missing any mechanics here?