Sunfire Cape
Build Path: 
+ 
+ 
+ 800 Gold = 2900 Gold
+425 Health
+60 Armor
UNIQUE Passive- Immolate: Deals 9 (+1 per level) magic damage per second to nearby enemies. For every nearby enemy champion, this damage is increased by 50%. Deals 100% bonus damage to minions and monsters.
UNIQUE Active- Eruption: After a 5 second delay, immolate with the energy of the sun, causing Immolate's damage to pierce 50% of each target's magic resist and grant the user a shield equal to 15% of the damage dealt for the next 7 seconds. The shield lasts for up to 5 seconds. (60 second cool down)
Frozen Heart
Build Path: 
+ 
+ 
+ 650 Gold = 3000 Gold
+500 Mana
+75 Armor
+35 Ability Power
+20% Cool Down Reduction
UNIQUE Passive: Your spells cause your target to have their attack speed slowed by 20% for 2.5 seconds.
UNIQUE Active- Ice Cold: Gain a shield equal to 150% of your maximum health and increase your Armor and Magic Resist by 100% for the next 2.5 seconds. However, during this time, you are suppressed. (120 second cool down)
Rabadon's Deathcap
Build Path: 
+ 
+ + 700 Gold = 3800 Gold
+300 Health
+300 Mana
+120 Ability Power
UNIQUE Passive- Eyes of Pain: +15 Magic Penetration
UNIQUE Active- Power Overwhelming: For the next 5 seconds, your total Ability Power is increased by 45% and you gain an additional 30 Magic Penetration. (90 second cool down)
Liandry's Torment
Build Path: + + 550 Gold = 3250 Gold
+300 Health
+40 Armor
+80 Ability Power
UNIQUE Passive- Eyes of Pain: +15 Magic Penetration
UNIQUE Passive: Spells burn enemies for 3 seconds, dealing 2% of their current health as magic damage each second. This effect can stack up to 3 times for up to 6% of their current health as magic damage each second.
Rylai's Crystal Scepter
Build Path: 
+ 
+ + 
+ 415 Gold = 2900 Gold
+100 Ability Power
+400 Mana
+8% Movement Speed
UNIQUE Passive: Your spells cause your target to be slowed by 10% for 1.5 seconds, stacking up to 3 times.
UNIQUE Passive- Frostbite's Teeth: Damaging an enemy that is slowed by at least 30% or affected by another movement impairing crowd control will cause the enemy to be rooted for 1 second. This cannot occur on the same target more than once every 60 seconds.
Wit's End
Build Path: 
+ 
+ 
+ 500 Gold = 2900 Gold
+45% Attack Speed
+30 Armor
+30 Magic Resist
UNIQUE Passive: Your basic attacks deal an additional 25 bonus physical damage and 25 bonus magic damage on-hit. Basic attacks also steal 4 Armor and Magic Resist from the target for 6 seconds, stacking up to 5 times.
Ohmwrecker
Build Path: + + 
+ 100 Gold = 3300 Gold
+425 Health
+60 Armor
+60 Magic Resist
UNIQUE Passive: Your basic attacks cause enemy structures to have their attack speed slowed by 15% for 4.5 seconds, stacking up to 3 times. Damaging an enemy structure while it is below 25% maximum health will cause to also cause the structure to take an additional 25 magic damage per second for 4 seconds.
UNIQUE Active- Wrecker: Nearby enemy structures take 3% (+1% per level) of their current health as true damage and are shut down for 4 seconds. This cannot occur on the same structure for 20 seconds. (90 second cool down) (600 range)
Just a few items I decided to pitch out a few ideas for. In my opinion, these items are either too niche or are just too bad to be shared with others. With new and improved jobs that allow them to fit into almost any meta, these items show off the their true colors and destroy the enemy team. Just some thoughts...
Build path: 
+
+either 
OR 
