Quote Originally Posted by ftafp View Post
Hecatoncheires

[...]

At level 10 you get sentinel, which with your reach and stunning strike is phenomenal. if you're playing a bugbear, the combination of 15 reach and stunning strike means you can shut down enemy attacks completely and waste their turns as a reaction from 15 feet away.
1. Fun build!

2. A nit: both Bugbear and the Astral Self leak say they increase your reach when you make the attack "on your turn", so they don't apply to the opportunity attacks.