Whenever Ahri hits a target with a spell, she gains a stack of Essence Theft. When she has enough stacks, her next spell that hits an enemy also heals her.
1
Orb of Deception
Ahri sends out and pulls back her orb, dealing magic damage on the way out and true damage on the way back.
2
Fox-Fire
Ahri gains a brief burst of movement speed and releases three fox-fires, that lock onto and attack nearby enemies.
3
Charm
Ahri blows a kiss that damages and charms an enemy it encounters, instantly stopping movement abilities and causing them to walk harmlessly towards her. The target temporarily takes increased damage from Ahri.
Ult
Spirit Rush
Ahri dashes forward and fires essence bolts, damaging nearby enemies. Spirit Rush can be cast up to three times before going on cooldown.
Ability descriptions from the official Wild Rift website.
This page is for League of Legends: Wild Rift (the mobile game), not League of Legends on PC. A Japanese version with guides and matchup notes is available: 日本語版.