I just lost to Genesis Ultimatum

Opp was on 4 health and I had a lethal flyer next turn and 3 more creatures on the ground. They didn't manipulate their deck in any way. They were out of gas with 0 cards in hand, drew a sibsig, drew the ultimatum, and they ripped 5/5 cards. 2 sagu pummelers, 1 eshki, roar of endless song, and trade route envoy. The fact that I lost to trade route envoy sucks already but in that way man that was a bad beat.