Complex sentence: Marie would then began to compete at "NXT" live events, where she ignited a feud with Carmella leading to a match between the two at the August 26 episode of "NXT" (taped during the event), which Marie won.
Split into simpler sentences: Marie would then began to compete at "NXT" live events, where she ignited a feud with Carmella. This led to a match between the two at the special August 26 episode of "NXT" (taped during the event), which Marie won.