Unfortunately for me it is another bad event, nothing good to win, Idols and hearts are a ridiculous reward for the sacrifice:
2 Utlimate sacrifice = some legendary dupe 4* souls, rare souls
4 exalted sacrifice = 1 ou 2 legendary and 4-5 rare dupe souls each......
2 ou 3 full vortex = same bad things
and 6 Idols and Hearts
I stop here and keep the rest for one better event ...