Here you can find all information to the rotating quests I have been able to collect so far:
30.3.2018 - Special Events added
8.4.2018 - Quest Resources added
2.5.2018 - All tables will be replaced by new ones (check out Mount Umber) over time.
Each element has its own rare quest which gives items needed for ascension of heroes of the same colour.
The sixth rare quest is of black colour and gives ascension items which are common for all elements: fine gloves, compass, damascus blade and tome of tactics.
From time to time items vary, when that happened to me I listed these and separated them with slash.
Power+ refers to the highest recommended team power seen for that stage and power- to the lowest.
I also added the hero comments before the quest starts and when it finishes. Again start and finish comment is separated by a slash.
Pois1, you are awesome! This is excellently put together and easy to read and understand. Thank you so much for donating your time and creativity to help all the other players out there!! 
Hello Pois1, nice work thank you.
I think that one is missing in the common quests : iron, currently online
In frostmarch I suppose there is a mistake in your powers for the level 5
Nice help.
Awesome chart!
Funny how the game makes midnight roots and grimoire dust a challenging item on a rare quest, they are easily obtained in level 8-7 which is a very easy level!
The ascention items are what we need!
Just keep feeding us more rare quests SG thanx
I need moderator help again. @Rook, can you please help? I am not able to edit this anymore.
I’m talking about Corellia, teltoc and Avalon… But a guy from my community found me that some minutes ago:
Aha, I see. Well, that is very nice. I thought you meant the Springvale Tournament since it is up now and included in the Monster Guide.
