Abilities of Nilah
Spell skill priority is an important winning factor for Nilah. Understanding the abilities of Nilah in League of Legends is another. Below you can find all the relevant information on Nilah abilities. In order for item builds you should check the build for Nilah.
Passive: Joy Unending
Nilah gains increased experience from last-hitting minions along with the ability to enhance and share nearby healing and shielding from her allies.
Formless Blade
With a snap of her whip-blade, Nilah damages any enemies she hits in a straight line in her chosen direction. This action extends her attack range for a short duration.
Passive: Nilah gains critarmorpen Armor Penetration, and her Attacks against champions restore critlifesteal damage dealt as Health. Overhealing from this is converted into a Shield for shieldduration seconds.
Active: Nilah cracks her whip-blade, dealing damagecalc physical damage, increased by her Critical Strike Chance. If an enemy unit or structure is hit, Nilah gains 125 Attack Range and bonusattackspeedcalc% Attack Speed, and her Attacks hit in a cone as attacktotaldamagetooltip physical damage for buffduration seconds.
Jubilant Veil
Nilah envelops herself in mist, increasing her movement speed and allowing her to gracefully dodge all incoming attacks. Any allies she touches during the mist's duration will also gain this effect.
Nilah envelops herself in mist for baseduration seconds, becoming Ghosted, gaining movespeedpercent*100% Move Speed, dodging Attacks, and reducing magic damage taken by magicdamagereduction*100%.
While active, touching allied champions envelops them in mist, granting the same benefits for sharebaseduration seconds.
Slipstream
Nilah enthusiastically dashes toward her target, dealing damage to any enemies she passes through on the way.
Nilah dashes through a unit, dealing dashdamage physical damage to any enemies she passes through.
Apotheosis
Twirling her whip-blade in joyful exuberance, Nilah deals damage to enemies around her before pulling them closer with her weapon.
Nilah whirls her whip-blade, dealing damagepertickcalctooltip physical damage over 1 second, then finishes with a burst of damagecalc physical damage that also Pulls nearby enemies toward her.
Nilah heals herself and nearby allies by champhealingpercent (+spell.nilahq:critlifesteal Formless Blade) of her damage dealt to enemy champions' Health (otherhealingpercent*100% for non-champions), converting any overhealing into a Shield for duration seconds.
FAQ on Nilah
What do you max first on Nilah?
Most Nilah pros max out 
Formless Blade first.