I have to begin by saying that Robin turned out to be something of a power player.
When Arthur began his Roll20 campaign Ilvantar, it was mainly for our family, and he was working out the kinks in the system. We were his playtesters. I ran Cage (ranger-type), Anita had Rosa (heavy magic and stealth), Kyrie was Somura (stealth/diplomacy), and Robin recreated Maxwell (magic and healing -- mostly healing), one of her first D&D characters and a longtime NPC in her own game. The kids played when they could muster the attention for it.
Maxwell...overdid things. I won't sidetrack this story by telling about all the things he overdid, but there were a lot. If he had the choice of setting a duration of a spell for hours or days, he chose weeks. Or months. Or millenia.
I'll give you an early example. One of our early campaigns was to rescue a village of humans from a tribe of gnoll captors. We established a base of operations in a nearby grove of fruit trees, and Maxwell thought it would be a good idea to set up a "healing point" at our camp. He centered it upon one of the trees, anyone in a certain radius regenerates a huge amount (it's been so long I've forgotten how much, I think 70 hp per round), and he set it to last for millenia. He burned up all his Power doing that, and dipped into health reserves if I recall correctly -- this was before I started making detailed notes, but somebody has them and can correct me. That tree became a key part of future events, and for all I know, it is still there, spread throughout the entire world of Ilvantar by now. That's when we began calling Maxwell "Miracle Max." It's also when Arthur began modifying his magic system.
Enter the Bitter Trees.