Kor Hookmaster (5e Feat)

You have mastered the art of using the kor hook and hedron hook, gaining the following benefits:

You gain a +1 bonus to attack rolls you make with a kor hook or hedron hook.
When you use a kor hook or hedron hook, its damage die changes from a d4 to d6, and from a d6 to a d8 when wielded with two hands. (This benefit has no effect if another feature has already improved the weapon’s die.)
Your speed increases by 10 feet while climbing using a koor hook or hedron hook.