Warlocks get their first pair of Invocations at Level 2, but can grab one earlier with the Eldritch Adept feat. After that, they choose a new Invocation at Level 5, Level 7, Level 9, Level 12, Level 15, and Level 18, for a total of eight Invocations.

How many times can you use Eldritch invocations?

1 Answer. Their use is unlimited.

Can you stack Eldritch invocations?

There is nothing in the rules that say you can't take the same Invocation twice.