Introduction

The Rebuke feat lets you knock an enemy Prone when you deal Radiant damage to them, similar to the Warlock’s Eldritch Smite invocation.

Knocking a foe Prone without a save is great, but once per rest simply isn’t enough to justify this feat unless you have some other ability that requires an enemy to be Poisoned.

Ability Score Increase

Anything!

Radiant Strike

Auto-prone an enemy once per rest when you hit them with Radiant damage. Divine Smite, Sacred Flame, True Strike, whatever.

Of course, you could also use a Topple weapon, but that does allow a save.