[Infinity] Artifact - Apotheose Dial

Given the multiversal nature of the Infinity Guard, I realized a sundial would be very appropriate. It also lets me design items for less popular weapons like the javelin. This artifact is a big one and provides a way to travel through time (if your game even wants to touch that).  The catch is that the dial doesn't travel with you, so unless you have secured the dial, the dial may not be where you expect once you arrive.

This artifact is also a set (which are always fun). On its own, it doesn't do much (aside from a very useful augury and a consistent out-of-combat re-roll (can't use the javelin/shield while in sundial form), but the sundial makes the constituent parts stronger.

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The sundial is an eternal artifact immune to alterations and adjustments to its timestream. Some speculate it was created by an elder celestial being possibly older than the universe itself. Others believe it to be the creation of a gifted chronomancy wizard who fixed the dial permanently in the universe's timestream. Either way, all origins for this artifact are untraceable, perhaps indicating it came from an entirely alien cosmos beyond understanding.

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Apotheose Dial
Wondrous item, artifact set (requires attunement)

Two Parts of a Whole. This sundial consists of the Chronostad Needle and the Dimensional Sieve. When the objects are within 100 feet of each other, they emit a low vibration until they are united. While both objects are in your possession, you can attune to them as a set, for which they are considered a single item for purposes of attunement to magical items. Attuning to the set counts as attuning to both component objects. You can use an action to physically combine the Chronostad Needle and Dimensional Sieve into a sundial, during which you cannot use their individual properties. Conversely, you can use an action to separate the sundial into the Chronostad Needle and Dimensional Sieve.

Spear and Shield. While attuned to this set, the Chronostad Needle and Dimensional Sieve regains all expended charges at dawn.

Manipulate Spacetime. While the combined sundial is in your possession, you can use it to reverse or otherwise affect a past outcome. Whenever you fail an attack roll, ability check, or saving throw, you can use your reaction to reroll the d20. You must use the new result. Once you use this property, you can't use it again for the next hour.

Glimpse Future. While the combined sundial is in your possession, you can peer at your immediate future through the dial face. You can spend 1 minute to cast augury, which grants you the results of an action you plan to take within the next hour instead of 30 minutes. Once you use this property, it can't be used again until the next dawn.

Leap the Path. You can use the combined sundial to step into another point in time and space. You can choose any target destination provided it is not magically warded, as well as any time in the past, present, or future. For each year or 100 miles you travel from your current position, you must spend 1 minute rounded up, adjusting the sundial, concentrating on the destination (as if concentrating on a spell), and calculating the trajectory of your leap. For example, traveling 4 to 5 years into the past requires 5 minutes of preparation. If this preparatory period is interrupted, the travel fails, but you still expend a use of this property. At the end of the preparation period you and up to 5 willing creatures of your choice within 5 feet of you teleport to the chosen destination and time, appearing in unoccupied spaces nearest to the target. If the destination is vaguely described, the GM decides where you appear. The sundial does not travel with you.  The GM also determines whether this time travel attracts the attention of the Infinity Guard or some temporal horror. Traveling within 1 month of your current time is generally safe, but you draw more attention if you travel further, travel repeatedly, or disrupt the past. The GM decides what form of time your setting currently operates with, such as multiversal, strict timeline, temporal river stream, or any combination of them.  A creature that has traveled to another destination in time and space cannot do so again until it has finished 1d4 long rests. An Apotheose Dial that has been used for this feature cannot be used again until 3d6 days have passed for it. 

Destroying the Sundial. The sundial is an eternal artifact immune to most conventional means of destruction. To rid all time of the sundial, the Chronostad Needle must be consumed a cosmic entity that represents infinity such as the Cosmic Ouroboros that encircles the universe, and the Dimensional Sieve must be consumed by a cosmic entity that represents the void such as the Great Raven god-titan. If either part is destroyed while the other still exists, the destroyed part reappears somewhere in the cosmos after 100 years. Once both objects have been destroyed, the sundial disappears from all points of time in existence.