Nuclear Physicist

Masters and Doctors of Atoms. (This Subclass is a joke, so dont take it too seriously)

Nuclear Physicist Spells

You have a list of certain spells tied to your subclass.

3rd - Ray of Sickness, Thunderwave
5th - Pyrotechnics, Shatter
9th - FireBall, Stinking Cloud
13th - Gravity Sinkhole, Vitriolic Sphere
17th - Destructive Wave, Immolation

Nuclear Fission

Starting at level 3, you know that when atoms split, theyre the deadliest. When you cast a Spell which needs an Attack roll from you, you can choose to Split that Spell in two directions, targeting two creatures instead of one. You can use this trait a number of times equal to your Proficiency Bonus and recharges all uses after a Short or Long rest.

Molecule Bending

Starting at level 3, Your expertise in Molecules helps you in many ways. You may use the Presditigitation or Thaumaturgy spell once per short rest.

Simple Math

At level 5, You learn to count.
When you use the Neuclear Fission trait, you may target 3 creatures instead of 2. This number increases to 4 at level 9, and to 5 at level 15. Additionaly, you may now attack one creature with multiple splits.

Scientific Explosions

At level 9, Splitting atoms is your speciality.
Whenever you deal damage with a Spell which requires an Attack Roll, anyone in a 5 foot radius around the target takes damage equal to your Intelligence modifier. The Damage type is the same type as of the Spell you cast.

Now I have become Death...

...,The Destroyer of Worlds. At level 15, You can spend 10 days and 1000 Platinum Pieces building an Atomic World Destroyer. Once built, the bomb can be remotely detonated by you from anywhere. It can be defused for it to be destroyed. When detonated, the bomb will immedeatly obliterate anything and anyone (aproximately 100d12 Fire Damage from the explosion, 60d12 Acid Damage from radiation, 80d10 Bludgeoning Damage from shockwave, 80d10 Thunder Damage from the sonic explosion) in a 1000 foot radius. The Explosion can be seen from up to 8000 feet away and heard up to 5000 feet away. It also coats the entire radius in a Radioactive aura which deals 10d12 Acid Damage per minute to anyone inside. This radius stays for about 30 Years.