Alright, so this one is potentially VERY complex, I don't even know if its possible...
I'm HIGHLY considering having Dullahan becoming a Draoidh (basically an umbrella term synonymous with sorcery in scottish/irish folklore) through Skills. Draoidh being a profession with Rituals as a Skill, and a few other things. However, I'd like to have Rituals stem from this into abilities using Essence as well.
The first one I thought of is named Bountiful Harvest
Essentially, it has three components.
First:
Variable Creation (200) Rank X
Modifiers; Ongoing (+100), Activation (-100), Finite; one hour (-50), Limited; Requires sacrifice =/> amount created (-50), Concentration (-50)
This part is the ritual to create enchanted food and dishware, basically a banquet. Each square foot (of food and dishware) is 1 serving. The ritual would take at least one minute of prayer-like chanting. The food and dishware vanish in 1 hour if not consumed. Sacrifice should have monetary or sentimental value to the owner.
Second:
Healing (200) Rank X
Modifiers: Triggered; Eating one full serving (+50), Activation; Time to consume (-100), Limited: to amount of servings created/2 or 3 servings per 24 hours, Side Effect; overeating pains (-50)
The healing effect is immediate upon eating a full serving, and one creature can benefit from multiple servings. However, food does not vanish when eaten so in effect only two or three servings can be eaten before the creature suffers entirely mundane symptoms of overeating. The Activation is of course the time to consume, which would be well above 30 seconds I believe.
Third:
Adaptation (Starvation/Thirst + Disease) (100) Rank 2
Modifiers: Triggered; Eating one full serving (+50), Finite; 24 hours (-50), Limited; only once per 24 hours. (-50)
Upon eating one full serving, the consumer gains sustenance and hydration for a 24 hour period. All current non-magical diseases are removed, and the consumer is immune to diseases for the same period.
I think this might work as-is, though the wording might sound a bit robotic for an appropriate description.
Edit: The Rank X is me not being sure what rank they will be bought at to start with.