Dr. Viktor, or How I Learned to Love the Atomic Deathray
this has been updated for the new forum
is an interesting champion. His mechanics are seemingly powerful, but they turn out to be incredibly limiting in the long run. The irony is, of course, that his entire concept is one of unrivaled evolution and growth due to personal augmentation. I have come up with a fairly drastic rework that aims to make him the evolutionary master he set out to become.
The new upgrades will no longer take an item slot. Instead, they will be personalized buffs, similar to elixirs with unlimited duration. Whenever Viktor changes upgrades, half the cost of the upgrade he originally had is refunded. The pricing scheme works as follows: Phase 1 Upgrade = 1000g Phase 2 Upgrade same path = 1000g (2000g total)
So if Viktor goes from Phase 1 Death into Phase 2 Gravity, it will cost him a total of 2500g (1000 - 500 refund + 2000). Changing from a phase 2 into a different phase 2 would cost a total of 3000g, etc.
Here are the new abilities:
New Default Passive: Hexcore 
Viktor has augmented himself with unparalleled Hexcore technology. This ingenious marvel analyzes threat patterns and adapts to better defend and act against those threats.
- Whenever Viktor takes damage from a champion, large minion, or large monster, he gains a stacking buff of either 5 armor or magic resistance based on whatever damage type he took
- Whenever Viktor deals non-damage-over-time damage to a champion, large minion, or large monster, he gains a stacking buff of either 5 armor reduction or 5 magic resistance reduction based on whether he dealt physical or magic damage
- Whenever Viktor is out-of-combat for more than 5 seconds, he loses half (rounded up) of his buff stacks every 2 seconds. Re-entering combat prevents further loss of stacks
New Phase 1 Upgrade: Hexcore Upgrade: Death 
Viktor modifies the learning algorithms of his Hexcore to focus more on optimizing methods of eliminating targets before they can pose a threat to vital systems.
- Viktor no longer gains magic resistance or armor from his Hexcore
- Death Ray deals an additional 30% damage as magic damage over 3 seconds, ticking once every 0.5 seconds
- Champions kills made by Death Ray grant 2, while siege minions and large monsters killed with Death Ray grant Viktor a single Stack of Doom
- Every Stack of Doom adds 0.05 seconds to the duration of his Death Ray's damage-over-time debuff (every 10 stacks adds a tick of damage)
New Phase 1 Upgrade: Hexcore Upgrade: Gravity 
Viktor modifies the learning algorithms of his Hexcore to be pro-active instead of re-active to environmental stimuli. Specifically, he inputs relativistic formulas intended to better enable him to suppress obstacles before they are a threat.
- Viktor no longer gains any stacking offensive or defensive bonuses from Hexcore
- Viktor gains 10% cooldown reduction
- Gravity Field's range and slow potency are increased by 33%
- Gravity Field now stuns after only 2 stacks, and targets stunned by Gravity Field are pulled to the center of the trap
- Every target stunned by Gravity Field returns mana to Viktor. Champions and large creatures restore 30 mana, while small minions and monsters return 15 mana.
New Phase 1 Upgrade: Hexcore Upgrade: Power 
Viktor modifies his Hexcore to focus almost exclusively on defensive algorithms. This enables greatly increased survivability at the cost of offensive capability. Offensive power capacitors are re-purposed for repelling imminent threats.
- Hexcore no longer grants armor reduction or magic resistance reduction
- Power Transfer shields Viktor instantly instead of on-return and strength is increased by 30% (max value 135 + 0.35 AP)
- Viktor's movement speed is increased by 30% for 3 seconds
- Viktor gains 30% bonus tenacity while the shield is active
- Power Transfer no longer has a cast time
New Phase 2 Upgrade: Death Storm 
Viktor alters his Chaos Storm device to be a far more effective instrument of destruction
- Chaos Storm reduces the magic resistance of targets under it by 10/15/20%
- The base damage, not the AP ratio, of Chaos Storm's damage-over-time element is increased by 1% per 2 stacks of Doom
New Phase 2 Upgrade: Gravity Storm 
Viktor alters his Chaos Storm device to effectively suppress any threats it discovers
- Enemies inside of Chaos Storm gain stacks of Gravity Crush every half-second that linger for 1 second after leaving the Chaos Storm
- Enemies with 3 stacks of Gravity Crush are pulled into the center of the storm for (1.5/1.75/2) seconds, during which time they are pulled along with the storm's movement
New Phase 2 Upgrade: Power Storm 
Viktor alters his Chaos Storm device to bolster his team's defenses by draining his enemies offenses and vitality, but the duration is lowered to 5 seconds.
- Champions inside of Chaos Storm gain stacks of Power Drain every half-second that linger until Chaos Storm expires (max 5 stacks)
- Each stack of Power Drain on an enemy reduces that champion's damage by (5/8/10)%
- If an enemy champion dies while it has Power Drain stacks, all allies within 400 units of that enemy are healed for (5/8/10)+0.01 AP life per stack. When Chaos Storm's duration expires, it gathers all remaining stacks of Power Drain and grants Viktor (10/15/20)+0.02 AP life per stack