Alexander's Well of Gravitas

The forces of the earth are doubled in potency in a 20-foot cube with a point of origin that you choose. The area becomes difficult terrain. When the spell ends, the forces of the universe reverse to normal.

If a creature is standing in the area when you cast the spell it must pass a Strength save or be knock prone. Creatures have disadvantage if they are not on the ground.

At higher levels:If casted using a 3rd-level spell slot, a creature standing in the area has now a disadvantage, and any creature entering must pass a Strength save or be knocked prone. If knocked prone, the creature must make a second Strength saving throw or be restrained. A restrained creature can release itself by using its action to attempt another Strength save against your spell DC, being freed on a success.

If casted with a 4th-level spell slot, you can modify the form of the Area of Effect to either: 1. a 40ft cube 2. a 20ft wide and 60ft tall rectangle

If casted using a 5th-level spell slot, any creature that starts it's turn or enters for the first time in the area must make a Strength saving throw or take 3d8 force damage and be knocked prone.If knocked prone, the creature must make a second Strength saving throw or be restrained.

When casting this spell using a spell slot of 6th or higher, the damage increases by 1d8 for each slot above 5th until 8th to a maximum of  6d8.

If casted using a 9th-level spell slot, you have the strength of a planet and armies bow to your feet. The area of effect increases to a 360 foot cube and the range and the cast range increases to 1 mile, the area becomes difficult terrain. Any creature standing in the area when you cast the spell or when they enter the area for the first time must throw a Strength saving throw with disadvantage, all creatures that starts their turn or enter for the first time in the spell's area take 8d8 force damage and are knocked prone and restrained in a fail or take half the damage and knocked prone on a success.