Boon of the Beast Master (5e Epic Boon)

This boon can be awarded to a Revised Ranger of the Beast Conclave

Your Animal Companion gains the following abilities:

For each level you have your Companion gains an additional hit point.
Your Companion gains +1 to it's proficiency bonus.
Your Companion regains it's Multiattack option if it has one.
The Companion can now maintain a caster's concentration, allowing the caster to cast a second concentration spell.
The Companion gains the ability to speak and understand Common if it does not already.
Your familiar can be a Beast or Monstrosity creature with a maximum challenge rating of 5. The creature must be Large size or smaller.