You may use Strength instead of Dexterity when firing this weapon. When you do, the damage die increases to 1d10, and the range increases to (160/640).
Proficiency with a Longbow allows you to add your proficiency bonus to the attack roll for any attack you make with it.
This weapon has the following mastery property. To use this property, you must have a feature that lets you use it.
Slow. If you hit a creature with this weapon and deal damage to it, you can reduce its Speed by 10 feet until the start of your next turn. If the creature is hit more than once by weapons that have this property, the Speed reduction doesn’t exceed 10 feet.
Notes: Weapon Property: Finesse, Weapon Property: Versatile, Strength Range 160/(640), Character with a Strength score of 18 or higher, Damage, Combat, Ammunition, Heavy, Range, Two-Handed, Slow
This is great! I always wanted to see a heavy, more powerful version of the longbow!