The Seratic Set is an armor set found in Infinity Blade II and Infinity Blade III. Wearing the full set gives you 1000 HP per parry in Infinity Blade II, though the Infinity Blade is not needed.
The set includes the Nodus, Eridius, Seratic Armor, Iridix and the Infinity Blade.
The set was equipped by Siris in Infinity Blade II's tutorial, with the exception of the Iridix. Instead Siris equipped a Ring of Ice and Fire.