Critical Wrath

Increase one ability score of your choice by 1

You've learned how to target weak points more efficiently gaining the following:

•  All of your attacks score critical hits on a 19-20. 18 if you already score crits on 19 and etc.
• You deal an additional damage die on a critical hit. 
• If an enemy rolls a nat 1 on a saving throw against an attack that deals damage treat that attack as a critical.