how to calculate initiative bonus 5e

The maximum permanent incentive bonus in 5e dnd is +66+1d10.

The Reading

The manual loses its magic but is rediscovered in a century.
Sphinx lair activities are the best way to stay alive for a century. Cindy asks Sven for assistance. After you have spent a month reading all the books, Sven will alter.

The flow of time is within the lair. Everything within moves up or down to 10 years (sphinx’s decision).

Do this ten times, and the books will regain their magic. You can then go back 100 years to reread them. For a +10 ability modifier, continue this process until your relevant ability scores reach 30. To ensure that the books are not stolen during “incubation,” you can protect the lair with Sven for one hundred years.

What are the Advantages?

This shield gives you an advantage in initiative rolls and Wisdom checks.

How to Calculate the Initiative in DnD 5E

That would hold for Dungeons & Dragons for all combat, if not for initiative determining who goes where and when.