Some of the changes (keep in mind that the mana values are subject to change):
Undead
- Vampiric aura is only activated (screenflashing) when actually gaining health.
- Suicide Bomber (Ultimate) requires 30 mana to go off.
Human
- Blink (Ultimate) requires 30 mana.
- The flash effect when using blink now has a longer hold time.
Orc
- ChainLightning (Ultimate) requires 30 mana.
- ChainLightning now travels from target to target for each step instead of from caster to all 3 targets.
- ChainLightning jumps are broken when someone with immunity is hit.
- New skill: Improved critical strike. Increases the chance of getting a critical strike.
- Critical grenades are rewritten and now have a higher damage radius based on damage inflicted.
Night Elf
- Entangle Roots (Ultimate) requires 30 mana.
- Targets that are hit by entangle roots are now totally stuck in place, unable to move or jump
- Entangle Roots can now activate on targets mid-air.
- New ability: Tranquility. When activated, heals all teammates within area of effect over time for 15 seconds. Requires 22-40 mana based on skill level to cast. Bind a key to "ability" to use.
Blood Mage
- Immolate (Ultimate) requires 30 mana.
- Siphon Mana now leeches 1-5 mana based on skill level from the target as well as money
- Siphon Mana requires 2-10 mana to cast based on skill level
- New skill: Improved siphon mana. Increases the chance to reduce mana cost of siphon mana to 0. 100% at max level.
Shadow Hunter
- Big Bad Voodoo (Ultimate) requires 30 mana.
- Big Bad Voodoo now gives 75% reduction to bullet damage when active (55% if the attacker has immunity). for 4 seconds. It makes you vulnrable to knife damage though.
- Hex and Unstable Concoction now cost 10 mana each time they go off.
- Serpent Wards now cost 15 mana to place.
- Serpent Wards placed by a player now stays if he dies and are respawned.
Warden
- Vengeance (Ultimate) requires 30 mana.
- Shadow Strike requires 10 mana.
Crypt Lord
- Locust Swarm (Ultimate) requires 30 mana.
- Orb of Annihilation, Carrion Beetles and Impale now costs 10 mana to cast.
There are alot of general changes to how the system works (which I should have written down on paper while doing them, but didn't).
Time to get started on the new skills and abilities.