Isendra by tuntakon

Ice hydra specialize in CC and team fight.
First ice hydra head will shoot the bolt of ice that slow enemy for a while.
Second ice hydra head will shoot an ice blast to root the slowed enemy for a while.
Third ice hydra head will do the same as a second head, but has a debuff aura that slow and deal damage to everyone in it attack range.

Ice hydra will prioritize nearest heroes.

Lightning hydra specialize in pushing and zoning.
First lightning hydra head will launch 3 charged bolt that move slowly in a cone shape.
Second lightning hydra head will launch 5 charged bolt that move slowly in a wider cone shape.
Third lightning hydra head will do the same as a second head, but has a defensive buff that grants a shield for 15% of it remaining health to each friendly unit in it range when summoned.

Lightning hydra will prioritize whoever nearest.

Fire hydra specialize in focusing damage.
First fire hydra head will fire a fire bolt to the target. The damage is pitiful, with a very high fire rate.
Second fire hydra head will do the same with first fire head. But faster fire rate.
Third fire hydra head will do the same as second fire hydra head, but has an offensive buff that make all friendly unit in it attack range has more 10% attack damage (these damage counted as spell damage).

Fire hydra will prioritize whoever has the lowest HP percentage.

LVL1

Q - Ice Bolt - For each Ice elemental mastery in your possession, Isendra basic attack can slow enemy by 10% for 1 up to 3 second (7 second cooldown).
QUEST: Isendra slow and/or root enemies hero up to 30 second.
REWARD: attack with Ice Bolt increase all your Frozen Orb ammo by 1 for each ice mastery in your possession.
W - Charged Bolt - strike the enemy with Thunder Storm to launch a 3 charged bolt in a cone shape to the striking direction. Repeatedly striking it on the same enemy to launch a lot more charged bolt. (3, 5, 7, 9 bolt at once. 11, 13 while the quest is completed.)
QUEST: Deal enough damage from Charged Bolt.
REWARD: Increase Thunder Storm duration by 6 second. (Charged bolt from Lightning hydra count too.)
E - Warmth -
QUEST: deal damage with Fire Wall, Fire hydra or basic attack to increase mana regeneration rate
REWARD: Deal enough damage to reduce Fire Wall cooldown by 2 second.

LVL4

Q - Frost Nova - Frozen Orb deal damage and slow all nearby enemies when it expired and each time it shoot up to 4 shot.
P - Gloom's Trap - Excess elemental mastery generate health and mana.
E - Inferno - Hit the burning target with Isendra ability reset the burning duration. Fire Wall burning damage increase by 6% for each second it burn consecutively.

LVL7

D - Chromaggus's Affliction - When you summon tri elemental hydra. It will has the third hydra head aura of the last elemental in your possession that you used to cast Hydra. (only aura)
D - Alanna's Scheme - Dramatically reduce Hydra cooldown to 20 second and mana cost to 50. Now it can store up to 3 charges. Your hydra ability will consume only 1 mastery at a time to summon only 1 head hydra. Reduce hydra health to 1/4. Hydra no longer replace each other.
D - Jan'arai's Grace - increase Hydra attack range and hydra can be ordered to move to a different location.
S - Evocation - Activate to make Isendra next basic ability has no cooldown.

LVL10 HEROIC ABILITY

R - Arcanna's Trick - Spend the mastery in your second slot to use those basic ability without gaining elemental mastery. The third mastery will be moved to second slot. Can be used to spend the first mastery in your possession while you doesn't have the mastery in second slot.
R - Anomaly Rift - Fling every unit in the target area to you and fling every unit around you into target area. Grant a shield for 15% of it remaining health over 3 second to all allies unit affect by this ability.

LVL13

P - Incanter's Flow - Your basic ability lower the cooldown of your heroic ability by 2 second.
S - Lightning Deal 442 damage (+4% per level), knockback enemies unit in a line and give you 1 Lightning mastery.
E - Blaze - Create a trail of fire in your walk path while the Fire Wall is still active. Increase movement speed by 25% and burning enemies while stepping on it.

LVL16

Q - Chilling Armor - Friendly heroes around Frozen Orb gain 10 armor for 3 second that can be stack for each time it shooting. Increase Frozen Orb duration and ammo by 2.
W - Static Field - Thunder Storm deals an additional 5% of their maximum health as damage.
P - Nether Tempest - Increase Isendra ability power by 10% while you possess up to two different elemental mastery. 20% instead while you have three different elemental mastery.

LVL20

P

18/07/2019 - add UPDATE, add CONCEPT, completed OVERVIEW , completed PROS & CON, edited frozen orb (more explanation), edited charged bolt (text)