
Passive
Staggering Blow
Nautilus' first Attack against a target deals increased physical damage and roots them briefly.

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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
Nautilus' first Attack against a target deals increased physical damage and roots them briefly.

Q
Nautilus hurls his anchor forward. Colliding with an enemy pulls them and Nautilus together, dealing magic damage. Colliding with terrain pulls Nautilus towards it.
Base values from ability rank 1 upward.

W
Nautilus gains a temporary Shield. While it persists, his Attacks deal damage over time to his target and surrounding enemies.
Base values from ability rank 1 upward.

E
Nautilus creates three exploding waves around himself. Each explosion damages and slows enemies.
Base values from ability rank 1 upward.

R
Nautilus fires a shockwave into the earth that chases an opponent. This shockwave rips up the earth above it, knocking enemies into the air. When it reaches the opponent, the shockwave erupts, knocking his target into the air and stunning them.
Base values from ability rank 1 upward.