Sands of Time.

Can only be used once a year.

This vial of seemingly normal sand cannot be opened or broken, and emits inaudible whispers to any creature within 5 ft. of it. Upon the saying on an ancient incarnation imprinted on the vial and the rising of it to the sky, the sands within the vial swirl and twist, casting the Time Stop [Level 9] spell, allowing the user to take 1d4+1 turns in a row, which they can end mid-time stop by chanting the words used to cast the spell again on a bonus action. The inaudible whispers become screams of the damned to the user, and while time is stopped, they must make a WIS DC save of 18 to resist 3d6 psychic damage from the deafening screams in their head.

After the Time Stop effect ends, the user must roll a 1d20 for a Time Lapse effect, the consequences of bending time:

1 : After a lapse in time, a natural disaster what has struck the land before begins to occur. 2 : The land around the user reacts terribly, or maybe incredibly well, to the time lapse, and shifts and transforms into a state it might become in 1,000 years time. The land, in a 5,000 ft. radius, is affected by the Hallow spell, and any two of its effects. It will become known as either unholy, holy, demonic, abyssal, or fey land as well. Man-made structures are not affected. 3 : Yourself, creatures and land around you [10 ft.] decay and age at an alarmingly faster rate for an hour. Your STR, DEX, and CON stats reduce during this time for 2 each 10 minutes. Once the effect ends, the effects are reversed, but there is a low chance they do not reverse, and a high level remove curse spell, or a wish spell is needed to revert the effects. 4 : A creature in the past, present or future experiences a lapse and is transported to your current location in time. This creature can be of any CR, and of any alignment. 5 : Yourself, creatures and land around you [10 ft.] revert in age at an alarmingly rate for an hour. Your WIS, CHA, and WIS stats reduce during this time for 2 each 10 minutes. Once the effect ends, the effects are reversed, but there is a low chance they do not reverse, and a high level remove curse spell, or a wish spell is needed to revert the effects. 6 : A randomly decided party member is transported back in time to witness an event which they can only watch for 1 minute. 7 : A lapse in time causes a distortion in time, summoning the opposite alignment versions of yourselves to appear in your immediate area, with you looking at them, and them looking at you. 8 : The lapse causes a dimensional door to a random plan of existence, it lasts for 72 hours. 9 : A creature you've seen die within the past year comes back to life, and if the creature had INT lower then 12, raise it to 12, and its vengeful against whatever killed it and hunt them down. Be it a concept, person, group or force of nature. 10 : A creature you've seen alive within the past years randomly dies, and if the creature has INT lower then 12, raise it to 12, and it becomes vengeful and instantly aware of your current location, and will haunt you in many ways. 11 : The lapse causes the users or a random associate's essence to become disturbed and twist. The person effected by this is now cursed by a random curse of any severity [or DM's choosing]. 12 : The lapse causes an random object in the possession of the user or any associate's to become bound to the soul of any being the user or associate's is aware is dead, and is dead, like a historical figure, or they have killed, like a random kobold, to curse that object giving it benefits related to the spirit bound to it. The item is instantly bound to the person in possession of it. 13 : The lapse causes you to either devolve [Reduce Mental Stats, increase Physical Stats] or evolve [Reduce Physical Stats, increase Mental Stats] evolutionary. 14 : The lapse in time causes the land to twist and swirl as its essence shifts. The land becomes a different habitat, like desert, tundra, forest, plains, mountains, instantly. Man made buildings like ruins or towns are not affected. 15 : A randomly decided party member is transported forward in time to witness an event which they can only watch for 1 minute. 16 : The lapse effects the minds of the worshippers of any singular deity, and their worshippers completely forget of their current deity and begin praying and worshipping to either an Old God or a New God. Either an existing one or one of their own devising. Note: There is a chance any associates to the user and the user themselves are not affected by this. So they could become the sole worshippers of a now forgotten God. 17 : The lapse causes Bards around the world to suddenly know of a song which describes either a Victory of sorts or a Defeat of sorts. The song describes, cryptically, events which link to the user and their associates. None of the bards know what event this song describes. Another thing what could happen is if someone figures it out and is a Victory, they could begin praising the group, or if its a Defeat, they begin to hunt them, or shame them publicly. 18 : The time lapse causes a shudder in the essence of the world itself as everyone within 300 ft. begin to feel like their burning bodies are burning. This lasts for 10 minutes. During this 10 minutes, Dragons of Old or New, type decided either by the area of the DM, begin to flock to this area to either nest or make home back when Dragons where more common. It is guaranteed a important historical dragon, which is still alive, of sorts will appear. There is a chance that a reversible effect causes scales of the Dragons Type appears on the people within the area, and they might become Half-Dragons. 19 : The time lapse effect doesn't occur, but twists in power. Reroll on this table two more times, those effects take place, and treat this effect on any of these rolls as a 20. 20 : Nothing Happens.