Explosives Mastery

You've mastered fighting with explosives, causing untold destruction. You gain the following benefits:

• When determining the save DC of a grenade, mine, or missile you control, you can use 8 + your proficiency bonus + your Intelligence modifier, if it would be higher than the item's DC.
• You have advantage on saving throws against grenades, mines, and missiles you control.
• When using a grenade, mine, or missile that requires a saving throw and deals damage, you can take a penalty to the save DC equal to your proficiency bonus. If you do so, the item's damage increases by an amount equal to your proficiency bonus.