Complex sentence: Miko's horse Windstriker is likely unable to reach the mortal realm without Miko; and the Oracle also hinted that Belkar's action will have a hand in Vaarsuvius' end.
Split into simpler sentences: Miko's horse Windstriker is likely unable to reach the mortal realm without Miko. The Oracle also hinted that Belkar's action will have a hand in Vaarsuvius' end.