Oppenheim by Satouthedeusmusco

Ranged intelligence nuclear physics themed hero with a literal nuke as his ultimate!

Primary attribute: Intelligence
Attack range: 450
Strenght: 16 + 1.9
Agility: 25 + 2.4
Intelligence: 32 + 4

Atomic Avatar's biggest strenght is his third ability. A passive which leaves behind zones of weakening radiation wherever he goes, casts spells, or attacks.
His first ability is a very large AEO slow that travels forward. If anyone touches the center of the AEO the entire AEO will explode, dealing high damage and ministunning.
Is second ability relatively long cooldown mobility tool that theoretically has a very high damage potential and juking potential but will cost a lot of mana. Dealing maxium damage will require a lot of setup too.
His ultimate is a whopper of a spell that deals an unrivaled amount of damage in an equally unrivaled radius. But don't be fooled, it is easily countered and requires Atomic Avatar to channel it for 10 full seconds if he wants to deal full damage, and it only deals its maximum damage at close range.
His scepter gives him a comperatively more reliable high damage nuke that will help him deal with magic immunity.
His shard gives him the ability to irradiate a very large zone on the map for a very long time by putting down an effigy. The effigy has a high gold bounty though so it must be protected!

Despite having a big mana pool and high int gain Atomic Avatar is a really mana hungry hero. All his spells are really expensive.

All of his spells are "slow" but devastating in one way or another so Atomic Avatar really benefits from having teammates with stuns. He desperately needs someone to help setup his spells. He's not an independent hero.

Atomic avatar is really weak to interrupts and magic immunity. Mana burn will also hurt him, and while he is a walking nuke he's also really weak to being nuked due to his low health pool.

Atomic Avatar can be played in most roles besides carry. Though mid, offlane, or soft support will probably suit him the best.