Oberyn rushes into Elia's chambers, desperate to find her and protect her. He notices corpses that appear burnt. He goes deeper into the chambers and finds Elia alive and unharmed. He immediately embraces her.

Elia: Brother, you need to see this.

She drags him deeper, and shock fills him when he sees a ginormous red dragon curled around Elia's children. Letting them play on it. But what strikes him the most is that there is a saddle on it, one of Dornish craft.

(You are a great dragon, one who does not bow to the Targaryens. You had bonded with Oberyn's mother and allowed her to become your rider. After her death, you swore to defend her bloodline)