Hi Everyone.
You may find some of these imbalanced so fell free to suggest balance. I don't know how hard is the impmentation, but you may find useful stuff here.
Here they are:
1. Coup de Grace (Mortred) Aghanim's upgrade:
Upgrade to:
Level 1: 15% chance to 2.5 critical, additionally adds 1.5% chance to 5.0 critical
Level 2: 15% chance to 3.5 critical, additionally adds 1.5% chance to 7.0 critical
Level 3: 15% chance to 4.5 critical, additionally adds 1.5% chance to 9.0 critical
Adds new visual effect on triggering the critical.
2. Mana Void (Magina) Aghanim's upgrade:
Upgrade to:
Level 1: Reduce CD by 20s and Deals 0.8 damage per mana point missing
Level 2: Reduce CD by 20s and Deals 1.15 damage per mana point missing
Level 3: Reduce CD by 20s and Deals 1.3 damage per mana point missing
3. Warpath (Bristeback) Aghanim's upgrade:
Upgrade to: Remove stack limit.
4. Ghost Ship (Kunka) Aghanim's upgrade:
Upgrade to: Double ship's movespeed to 1300.
5. Winter's Curse (Winter Wyvern) Aghanim's upgrade:
Upgrade to: Increases AoE to 500 at all levels.
6. Stampede (Centaur Warchief) Aghanim's upgrade:
Upgrade to: Reduce cooldown by 30s at all levels and increase duration by 2s.
7. Ravage (Tidehunter) Aghanim's upgrade:
Upgrade to: Reduce cooldown from 150s to 120s at all levels and apply Cracken Shell negative buff removal on alies in the AoE.
8. Death Pact (Bone Fletcher) Aghanim's upgrade:
Upgrade to: Can target ancient creeps at all levels.
9. Ball Lightning (Storm) Aghanim's upgrade:
Upgrade to: Lower the Initial mana cost to: 15 + 4% of total mana pool and add Shocking ground trail behind.
Shocking ground lasts for 5 seconds and deals 30 dps. (If this causes significant performance problems Increase the impact damage based on distance travelled.)
10. Flaming Lasso (Batrider) Aghanim's upgrade:
Upgrade to: increase cast range from 100 to 800 at all levels and pulls the target back to the caster.