Cook Grenade Feat (Combat)
You can pull the pin on a grenade and hold onto it until the last second before its detonation, making it harder to avoid.
Dex 11, proficiency with grenades
As a full action, you can draw a grenade and make a ranged attack with it. If you do so, the grenade’s Reflex save DC is increased by 2. If your attack roll is a natural 1 (the d20 comes up 1), the grenade instead detonates at a randomly determined grid intersection of your space.