Yes. Happened to me too. I tried only using Abynissia and Princess Elspeth (2 slots empty). I casted Aby like 5 times and she didn’t summon Infernal King.
Yes I also had same hunch as @yonizaf that it’s starting with the empty slot causing the issue. I’d be happy to see this fixed though, I don’t want to have to kill something before I summon or this is going to be so slow it’s not worth doing…
Black Beast or Sacrifice would be the way, but then need to cast the summon, and then somehow win… yawn…
Thanks
It’s the worst event so far anyway - even if the top reward was for 50 stones, which I don’t think possible. At least for me, but I guess many will share the sentiment…