Demolitions Expert
It takes a certain kind of mindset to devote one’s life to blowing stuff up, and the process is as much art as it is science. Shaping an explosive’s charge so that it produces the exact effect you intend, detonating it in a glorious cataclysm of fire and shrapnel—it speaks to some in a way nothing else quite does.
Explosives Mastery
When you select this archetype at 3rd level, grenades and mines count as favored ordnance weapons for you. When a grenade you throw or a mine you have set deals damage, targets in the grenade or mine’s blast radius take additional damage equal to your favored ordnance damage. The damage type of this extra damage is the same as the type normally dealt by that grenade or mine.
Eye for Architecture
Also at 3rd level, you’ve learned to pinpoint the weaknesses in any structure. You gain proficiency in Engineering. If you’re already proficient in Engineering, you instead gain an expertise die. Your expertise dice in Engineering can be upgraded from d8 to d10, exceeding the usual limit on expertise dice.
Parabolic Trajectory
Beginning at 3rd level, you learn how to launch grenades in an arcing, parabolic trajectory, increasing their range. Your grenades have the thrown 30/60 property. When you use a grenade launcher to fire a grenade, the launcher’s range increases to 200/800.
Expanded Blast Radius
At 7th level, when a grenade you throw or a mine you have set explodes, you can increase its blast radius by 5 feet. If you do, you do not add your favored ordnance damage to the damage dealt by the grenade or mine (if any).
At 16th level, you can expand the blast radius of a grenade or mine by 10 feet. If you do, do not add your favored ordnance damage to the damage dealt by the grenade or mine (if any). Alternatively, you can reduce your favored ordnance damage to 1d12 to expand the blast radius by 5 feet.
Custom Munitions
Also at 7th level, you can create custom munitions. Whenever you finish a long rest, you can create a number of custom munitions equal to your proficiency bonus. Each of your custom munitions replicates the effects of one of the following grenades or mines, chosen by you when you create the munitions: foam, flash, frag, gas, goo, smoke (see Chapter 3: Equipment for details). Your custom munitions can be used even by creatures other than you, but only retain their functionality until the start of your next long rest.
In addition, you can customize the munitions you create even further with custom augments. You learn one of the following custom augments, which can be applied only to grenades or mines you create using this feature. You choose the augment you apply to each custom munition individually, but each can only have one augment.
Energized. If the grenade or mine deals damage, you can change the damage it normally deals to one of the following types: acid, fire, force, lightning, poison, radiant, thunder.
High Explosive. If the grenade or mine deals damage, the damage dice ‘explode’. Any maximum roll on a die (e.g. a 6 on a d6 or an 8 on a d8) allow you to roll that die again, and add the new roll to the original.
Shaped. You can alter the grenade or mine’s blast radius to a 60 foot cone or a line that is 60 feet long and 10 feet wide. If you choose this augment, you can’t use your Expanded Blast Radius feature to alter the size of the grenade or mine’s blast.
Blast Evasion
At 10th level, you have advantage on saving throws made against grenades, mines, and other explosives. In addition, when you are subjected to an effect that allows you to make a Dexterity saving throw to take only half damage, you instead take no damage on a success and half damage on a failure.
Munitions Factory
At 15th level, you become a veritable munitions factory. You learn all the custom augments listed in the Custom Munitions feature. In addition, you can create custom munitions when you finish a short or long rest and can create a total number of munitions equal to twice your proficiency bonus per long rest, though they still lose their efficacy as normal.
Creative Destruction
At 18th level, you’ve developed your ability to create explosives into a true art form. You gain the following benefits.
- Your custom munitions can replicate the effects of the following grenades or mines: concussion, EMP, incendiary, stun.
- You can now add two custom augments to any of your custom munitions.
- You can use an action to respec one of the custom munitions you have already created, quickly changing its type and any augments you have applied to it. Once you have used this feature, you must finish a short or long rest before you can do so again.