The Sylas build for Mid is Everfrost and First Strike. This LoL Sylas guide for Mid at Platinum+ on 13.23 includes runes, items, skill order, and counters.
Sylas Counters
52.3%
(+0.1%)
49.6%
11.0%
(+0.9%)
19.4%
(+0.6%)
821
(-4)
