Here's the current psycho idea I made for this guy. The numbers definitely need a lot of work, but you'll get the overall idea.
Peilimuur, the Demonic Mirror
Roles: Tank, Mage
Stats: Most TBD
Attack Range: 350
Weapons: Enormous demonic mirror, Lightning blaster
Passive: Demonic Reflection
Peilimuur is treated as the same type of unit as the last unit he basic attacked (if he basic attacks a minion, he is treated as a minion; if he basic attacks a monster, he is treated as a monster; if he basic attacks a champion, he is treated as a champion). Based on his current type, he gains the following effects:
Champion: Movement speed is increased 5%
Minion: Basic attacks deal 5% increased attack damage.
Super Minion: Basic attacks deal 10% increased attack damage, Armor increased 5%
Small Monster: Armor and Magic Resist are increased 10%
Large Monster: Health is increased 10%
Epic Monster: Health increased 15%, Ability Power increased 5%
Allies can use Summoner Spells on Peilimuur to have reversed effects placed on them for 3 seconds.
Q: Explosive Deflection
Peilimuur sets up a magic field around himself. The next ability that hits the field will be deflected back onto the user, dealing . The field begins with a 150-unit radius and extends at a rate of 50 units per second over the course of the next 3/4/5/6/7. If it lasts for its maximum duration, the field will explode, dealing 5/10/15/20/25 (+30% AP) magic damage to Peilimuur and 20/40/60/80/100 (+35% AP) magic damage to all enemies inside the field.
Cooldown: 12 seconds
Mana cost: 85
W: Mirror Wall
Peilimuur can have 3 mirror walls either in use or stored up at a time. Cooldowns only restore 1 charge, and only if the maximum has not been exceeded.
Upon activation Peilimuur selects a location within 400 units and sets a 200-unit barrier in that location, broad side facing him. Enemy attacks and abilities that go through or hit these walls lose 10%/20%/30%/40%/50% of the damage they would have dealt to their intended target. The walls absorb the lost damage, storing a maximum of 200 damage each. Allies can move through these barriers, but enemies that move through them have their directions reversed, moving in the opposite of their intended directions for 1/1.5/2/2.5/3 seconds. In addition, champions that move through the walls are dealt 50% of the damage stored by all three mirrors (+20% AP) as magic damage. Mirrors will lose this stored-up damage.
Mirrors last 10/10.5/11/11.5/12 seconds.
Cooldown: 7 seconds per charge, 12 seconds after a space becomes available if all 3 charges were in use.
Mana cost: 90
E: Hateful Reflection
Peilimuur creates a field around himself. Any damage dealt to him by enemies is reduced 10%/17%/24%/31%/38%, damage he and his allies do to him is halved, and the missing damage from all sources is done to enemies within a 350-unit radius of him in whatever form it was dealt to him as (magic damage will reflect as magic damage, physical damage will reflect as physical damage, true damage will reflect as true damage). Pure damage received from turrets is considered coming from an enemy and treated as magic damage for this ability. If over 300/350/400/450/500 damage is reflected in this way, the ability ends. If this is not the case after 5/6/7/8/9 seconds, Peilimuur will charge for 1.5/1.6/1.7/1.8/1.9 seconds, during which time his movement speed is increased 10%/11%/12%/13%/14%. All enemies within a 200-unit radius are hit with a shockwave dealing twice the remaining damage (+20% AP) as magic damage.
Cooldown: 20 seconds
Mana cost: 100
R: Vengeful Suicide
Peilimuur charges his lightning blaster for 3/4/5 seconds, during which time he can still move and his movement speed is increased 10%/15%/20%. At any point during the charge, he can re-activate the ability to end the charge. At the end of the charging period, Peilimuur deals 100/200/300 (+30% AP) magic damage to himself per second of the charge, giving enemies within a 200-unit radius Fear for 0.75/1/1.25 seconds and slowing enemies 20%/30%/40% within a 500-unit radius for 1/1.5/2 seconds. This can be used one more time within 3 seconds of the initial activation, but with only a 2/2.5/3-second charge time.
Cooldown: 230 seconds
Mana cost: 100.