Aevum's Weighty Tome

You focus the magical power held within your spellbook into one concentrated spot, when whallop another creature with it. Make a melee spell attack against the target. On a hit, the target takes bludgeoning damage equal to the number of pages in your spellbook that are filled with spells. The target must also make also make Constitution Saving throw if it is hit. On a failure, it is pushed back a number of feet equal to the number of pages in your spellbook that are filled with spells.

For example, a 2 level wizard with six level one spells and two level two spells in their spellbook hits another creature using Aevum's Weighty Tome. It inflicts 10 Bludgeoning damage, and the creature must succeed on a Constitution save or be pushed away by 10 feet.