O-ok i think i've calmed down a bit....
I've only just seen the rest of that ten roll since i closed the game after that screenshot and have just been staring at it in disbelief.
It was the 2nd 10-roll of the 7 that i could afford. I saw that the summoning animation was lagging a bit during the second card and hoped for the best, gold assasin card appear and my king descended upon me.