When you take the Attack action, you can replace one of your attacks with an explosion from this weapon's projectile. This explosion is a 5-foot-radius Sphere centered on a point you choose within the weapon's normal range. Each creature within the Sphere makes a Dexterity saving throw (DC 8 plus your Strength or Dexterity modifier and your Proficiency Bonus). On a failed save, a creature takes the weapon's damage, but don't add your ability modifier to that damage unless that modifier is negative. On a successful save, a creature takes half as much damage. You can create this explosion only once per turn.
Explode
MasteryValdaGunslinger2014
Raw data
{
"name": "Explode",
"__prop": "itemMastery",
"source": "ValdaGunslinger",
"entries": [
"When you take the {@action Attack|XPHB} action, you can replace one of your attacks with an explosion from this weapon's projectile. This explosion is a 5-foot-radius {@variantrule Sphere [Area of Effect]|XPHB|Sphere} centered on a point you choose within the weapon's normal range. Each creature within the {@variantrule Sphere [Area of Effect]|XPHB|Sphere} makes a Dexterity saving throw (DC 8 plus your Strength or Dexterity modifier and your {@variantrule Proficiency|XPHB|Proficiency Bonus}). On a failed save, a creature takes the weapon's damage, but don't add your ability modifier to that damage unless that modifier is negative. On a successful save, a creature takes half as much damage. You can create this explosion only once per turn."
]
}