Gain 10% CDR when you reach level 10. Excess CDR becomes AP or AD, Adaptive.
Offense
+5 AD or 9 AP
Flex
+5 AD or 9 AP
Defense
+15-90 Health
WhyElectrocute
Sylas is able to quickly proc Electrocute with an [E]->Auto->[Q] combo for massive burst damage.
WhySudden Impact
Both the dash from [W] and [E] allow you to easily proc Sudden Impact for even more damage output.
WhyEyeball Collection
Sylas is a champion that thrives on skirmishes and fights where he is able to pick up multiple kills/assists making Eyeball Collect a great snowballing choice.
WhyRavenous Hunter
Ravenous Hunter's raw lane/fight sustain is huge for Sylas because you'll be taking a lot of incoming damage as a short range melee caster.
WhyManaflow Band
Manaflow Band is quite easy to stack on Sylas thanks to his relatively easy to land [Q].
WhyTranscendence
Transcendence offers you a huge amount of damage output in the mid-game thanks to the CDR and a solid amount of AP in the late game thanks to it's CDR conversion.