Nautilus Rework Concept

P: Oceans weight Nautilus's iron suit and massive size make him immune to displacement (knock-ups, knock-backs, and pulls). They instead apply an 80% slow that decays over the duration of the displacement. Nautilus is also unable to increase his base movespeed and attack speed(masteries, champ spells, boots, and other items will grant all other effects except move & attack speed).

Q: Dredge line Nautilus hurls his anchor forward, dragging him and his target together and dealing magic damage. If Dredge line hits terrain he will be pulled the full distance. If the wall hit is small enough (something like Aniva W thickness), he will leap over it, but be slowed by 30% for 1 second afterward.

W: Abyssal curse Nautilus shields himself for a % of his max hp, and deals a short DoT effect. If Nautilus basic attacks the same target 3 times while the shield persists, they will be rooted for 1.5 seconds(once per Target, per spell cast).

E: Riptide Nautilus will channel for .5 seconds before releasing 3 damaging, slowing waves. The closest to him will deal magic damage and knock enemies back slightly, the second will deal the same damage as the first, with out the knock-back, and the third does 66% damage. Enemies hit by multiple waves will take reduced damage.

R: Drag them down When cast Nautilus will channel for 3 seconds, then release up to 5 dark, ghostly tentacles, each grabbing an enemy champion up to 1750 units away (enemies will see an indicator for max range at the start of the channel), and will then pull them 1250 units toward himself, dealing magic damage. Looking something like this

I believe his model should more closely resemble the one from A New Dawn.

Thoughts?