I'm just working out a design for a tank, please comment your opinions on the kit, which for the moment is going to lack any lore, the concept is for a curious aspect with a knack for collecting artifacts. A thing I'm trying to do with the kit is make it so that AP would be standard on the build and Archelon would still feel like a tank throughout.
-Passive: Event Horizon
Activating an ability causes Archelon to gain a (18-103)+(10% AP) point shield that lasts for 3 seconds. If Reality Tear is the triggering ability the shield's capacity is doubled.
_Event Horizon has a 5-second static cooldown._
-Q: Cloak Of Starlight
Archelon vanishes into his cloak, becoming invisible and gaining a 75% movement speed boost for 1 second. The invisibility and movement speed are lost if Archelon attacks, uses an ability, uses a summoner spell, or uses an item. While the invisibility holds Archelon can recast Cloak Of Starlight to strike enemies around himself and in a (350 unit long/150 unit wide) line, enemies hit take magic damage equal to 1% of their maximum health and have their damage output reduced by 8/16/24/32/40+(2 per 100 AP)% for 3 seconds.
_Cloak Of Starlight has a 13/11/9/7/5 second cooldown. _
Archelon's cloak releases burning light in all directions, causing enemies within 450 units of him to take 30/45/60/75/90+(20% AP) magic damage per second over 8 seconds. During this time Archelon is slowed by 0% which increases to 80% over the duration of the ability, but in return he regenerates (.5% Maximum Health) health per second for every enemy non-champion in the area, to a cap of (2.5% Maximum Health) that can be healed per second this way, as well as an additional (1% Maximum Health) per enemy champion in the area.
_Nova has a 24/21/18/15/12 second cooldown._
-E: Astral Chain
Archelon casts out a chain of stars that travels in a line with a 1000 unit range at a rate of 500 units per second. The chain deals 25/55/85/115/145+(50% AP) magic damage and slows the first enemy hit by up to 35/45/55/65/75% based on distance traveled for 3 seconds.
_Astral Chain has a 13/12/11/10/9 second cooldown._
-R: Reality Tear
Archelon rips a hole in space, causing a 250 unit line to form in front of him travelling 650 units over 1 second. All enemies hit take 150/200/250+(40% AP) magic damage and are put into stasis for 2.5 seconds.
_Reality Tear has a 120/105/90 second cooldown._