Exemple of build

Electrocute

Hitting a champion with 3 separate attacks or abilities within 3s deals bonus adaptive damage.

Damage: 50 - 190 (+0.1 bonus AD, +0.05 AP) damage.

Cooldown: 20s

Dark Harvest

Damaging a Champion below 50% health deals adaptive damage and harvests their soul, permanently increasing Dark Harvest's damage by 9.

Dark Harvest damage: 20 (+9 damage per soul) (+0.1 bonus AD) (+0.05 AP)
Cooldown: 40s (resets to 1.5s on takedown)

Hail of Blades

Gain 110% (80% for ranged champions) Attack Speed when you attack an enemy champion for up to 3 attacks.

No more than 3s can elapse between attacks or this effect will end.

Cooldown: 12s.

Attack resets increase the attack limit by 1.
Allows you to temporarily exceed the attack speed limit.

Cheap Shot

Damaging champions with impaired movement or actions deals 10 - 45 bonus true damage (based on level).

Cooldown: 4s
Activates on damage occurring after the impairment.

Taste of Blood

Heal when you damage an enemy champion.

Healing: 16-40 (+0.1 bonus AD, +0.05 AP) health (based on level)

Cooldown: 20s

Sudden Impact

Damaging basic attacks and ability damage deal a bonus 20 - 80 True Damage based on level to enemy champions after using a dash, leap, blink, teleport, or when leaving stealth for 4s.

Cooldown: 10s

Zombie Ward

Takedowns on enemy Wards cause friendly Zombie Wards to sprout from their corpses.

Gain an adaptive bonus of 1.2 Attack Damage or 2 Ability Power for every Zombie Ward spawned, up to 10.

After spawning 10 Zombie Wards, additionally gain 10 adaptive force.

Zombie Wards are visible, last for 120s and do not count towards your ward limit.

Ghost Poro

When your wards expire, they leave behind a Ghost Poro, which grants vision for 90s. Nearby enemy champions scare the Ghost Poro away.

Gain an adaptive bonus of 1.2 Attack Damage or 2 Ability Power for every Ghost Poro spawned and when your Ghost Poro spots an enemy champion up to 10 stacks.

After gaining 10 stacks, additionally gain 10 adaptive force.

Eyeball Collection

Collect eyeballs for champion takedowns. Gain an adaptive bonus of 1.2 Attack Damage or 2 Ability Power, per eyeball collected.

Upon completing your collection at 10 eyeballs, additionally gain an adaptive bonus of 6 Attack Damage, or 10 Ability Power.

Collect 1 eyeball per champion takedown.

Treasure Hunter

Gain an additional 50 gold the next time you collect a Bounty Hunter stack. Increase the gold gained by 20 gold for each Bounty Hunter stack, up to 130 gold.

Bounty Hunter stacks are earned the first time you get a takedown on each enemy champion.

Relentless Hunter

Ultimate Hunter

Nullifying Orb

When you take magic damage that would reduce your health below 30%, first gain a shield that absorbs 35 to 110 (+14% bonus attack damage) + (9% ability power) magic damage based on level for 4s.

Cooldown: 60s

Manaflow Band

Nimbus Cloak

After casting a Summoner Spell, gain a Move Speed increase that lasts for 2s and allows you to pass through units.

Increase: 5% - 25% Move Speed based on the Summoner Spell's cooldown. (Higher cooldown Summoner Spells grant more Move Speed).

Transcendence

Celerity

All movement bonuses are 7% more effective on you and gain 1% Move Speed.

Absolute Focus

While above 70% health, gain an adaptive bonus of up to 18 Attack Damage or 30 Ability Power (based on level).

Grants 1.8 Attack Damage or 3 Ability Power at level 1.

Scorch

Your next damaging ability hit sets champions on fire dealing 20 - 40 bonus magic damage based on level after 1s.

Cooldown: 10s

Waterwalking

Gathering Storm

Every 10 min gain AP or AD, adaptive.

10 min: + 8 AP or 5 AD
20 min: + 24 AP or 14 AD
30 min: + 48 AP or 29 AD
40 min: + 80 AP or 48 AD
50 min: + 120 AP or 72 AD
60 min: + 168 AP or 101 AD
etc...