As in title : runes + masteries for zilean
Magic Pen = Red
Yellow = Mana Regen, but prolly health bonus could be nice
Blue: AP (flat or scaling)
Quint: Ap or Magic Pen (but i think Ap is better because of the awesome AP ratio's on bomb)
ichi the killer
Mark: magic pen
Seal: mana regen or Hp/lvl
Glyph: flat CDR
More CDR means more bombs. More bombs = more kills = win.
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