Karma Pentakill in ranked

I got mid in ranked and decided to play Karma. (Click show more for music and build, runes and masteries)

Music: Boys, Be Courageous! / Hunter x Hunter 2011 Original Soundtrack

Dorans ring → Lost chapter→ Negatrons cloak→ Basic boots→ Fiendish codex→ Amplifying tome→ Blue trinket→ Abbysal scepter →
→Sorcerer's boots→ Amplifying tome→ Morellonomicon→ Aether wisp→ Needlesly large rod→ Ludens Echo→ Amplifying tome→
→Blasting want
(Remember to buy control wards! I was bad at buying it and ended up only buying 2 in total)

Masteries: (For other 12 points pick what you prefer)
Sorcery x5
Expose Weakness x1
Natural Talent x5
Battle Trance x1
Savageryx5
Assassin x1
Meditation x5
Bandit x1
Precision x5
Thunderlord's Decree x1

Runes:
Red: Greater Mark of Magic Penetration x9
Blue: Greater Glyph of Magic Resist x9
Yellow: Greater Seal of Armor x9
Big ones: Greater Quintessence of Ability Power x3