Complex sentence: The 2013 game also features a new version of the character called Shadow Jago, an altered version of Jago who is under the possession of Omen, Gargos's herald.
Split into simpler sentences: The 2013 game also features a new version of the character called Shadow Jago. It is an altered version of Jago, who is under the possession of Omen, Gargos's herald.