
Passive
Clockwork Windup
Orianna's Attacks deal additional magic damage. This damage increases the more Orianna Attacks the same target.

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Riot Data Dragon 16.20.1. Base values before items, runes and bonuses; independent of match-data filters.
Base-game reference only. Mode-specific balance changes and augments are not included.
Official short descriptions · Data Dragon 16.20.1
Base-game reference only. Item, rune and mode-specific adjustments are not included.
This reference covers the passive and four ability slots. Alternate forms and full damage calculations are not covered.

Passive
Orianna's Attacks deal additional magic damage. This damage increases the more Orianna Attacks the same target.

Q
Orianna commands her Ball to fire toward a target location, dealing magic damage to targets along the way (deals less damage to subsequent targets). Her Ball remains at the target location after.
Base values from ability rank 1 upward.

W
Orianna commands her Ball to release a pulse of energy, dealing magic damage around it. This leaves a field behind that speeds up allies and slows enemies.
Base values from ability rank 1 upward.

E
Orianna commands her Ball to attach to an allied champion, Shielding them and dealing magic damage to any enemies it passes through on the way. Additionally, the Ball grants additional Armor and Magic Resist to the champion it is attached to.
Base values from ability rank 1 upward.

R
Orianna commands her Ball to unleash a shockwave, dealing magic damage and launching nearby enemies towards the Ball after a short delay.
Base values from ability rank 1 upward.