Base Class: Warlock
The scroll is the creation of a angel or a devil and is left in a ruin or other old civilization or possibly a collector's house, maybe you obtained it from someone who did not know its power, regardless of the creator or the owner of the scroll the main points are it is powerful and ancient.
Scroll of Ancients
In addition the scroll can be used in the following ways.
Bombard - as a BA casting a cantrip that targets only one add an additional target within range of the first, use equal to CHA
Scrolls Insight - perfrom a ritual (10 min) to gain Advantage on a saving throw of your choice for the next 8 hrs or until you finish a short or long rest, you may do this once a day.
Scrollbound Curse/Blessing
Depending on your scrolls creator you gain resistance to Necrotic if Cursed or Radiant if Blessed.
Improved Ancient Scroll
Your scrolls abilities grow stronger.
Bombard - Now when you use a cantrip that targets only 1 you may choose 2 additional targets withing range of the first.
Scrolls Insight - you may now use this ability a number of times equal to half your prof. Bonus rounded down.
Scrollbound Boon - As an action expend a spell slot to choose one of the following boons.
A. Advantage on all spell attacks.
B. Temp HP equal to Warlock LVL + CHA
C. Gain a fly or swim speed equal to your walk speed.
D. Add 5 to your AC
The boons last for 8 hrs or until you take a short or long rest and each can only be used once per day.
Scrollbound Knowledge
The scroll knows you as you know the scroll as a ritual or for 2 pact slots to cast as an action you can bind your life to the scrolls. For 1 hour if you are reduced to 0 hp make a CHA saving throw treated like a death saving throw, on a sucess the scroll lets out a pulse and heals you for you Warlock LVL + CHA up to 2 times before the bond ends, if you fail 3 throws the scroll glows black and your body dissipates within the scroll for 24hrs or until the scroll is destroyed. If the scroll is destroyed while you are inside you exit with 1hp. When the 24 hours expire the scroll will glow white and return you to an empty spot within 5ft of the scroll at half hp with 0 spell slots.