New Kog'Maw + New Hextech + New Guinsoos + New Runaan's = OH GOD WHY?!

I'm only pointing out the unique passives of each item, you can see the stats for it yourself: http://4.bp.blogspot.com/-UTSbj2bD2Jk/VjK9kweyJdI/AAAAAAAAzgo/Dr1PnEdiPl8/s1600/rhhh.jpg (Adds 15 physical damage on-hit and shoots 2 additional bolts that do on-hit and can crit; only 2,500 gold)

http://1.bp.blogspot.com/-RjyM_wgS9tM/VjKpVUtsswI/AAAAAAAAzdc/mVYfMC1-b5A/s1600/ragen.jpg (Does On-Hit AOE, while giving a ridiculous amount of AD + AP + AS when fully stacked; only 2,500 gold)

http://2.bp.blogspot.com/-N887j7BStXU/VjK71jOxDgI/AAAAAAAAzgI/s8josqwuReU/s1600/65345435.jpg (Heals for 15% of damage done; ALL DAMAGE DONE)

Just let this sink in for a second.

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EDIT

Adding this item in: http://4.bp.blogspot.com/-ZZcWNF7T4kU/VjKF1T92hvI/AAAAAAAAzWI/D5VBA3-iVQ4/s1600/deathsdance.jpg (If he builds this item also, literally nobody [short of an entire team of burst assassins/mages] will be able to burst him from 100-0, thus allowing him to activate his W and heal it all back up; he's literally nearly unkillable with these 4 items)