I posted this over in the general D&D 5E forum here last May. But, thought it might get different eyes here in The Workshop. LordEntrails and Zaccheus replied over there (thanks to both!). Which, summarized, was: "you'd need a suitably curious extension writer." Which was exactly my hope. "Some mad scientist genius who needed a new nut to crack."

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Game: Dungeons & Dragons Fifth Edition

Question: Is anyone interested in writing an extension that turns RAW cantrips into a Level 0 spell for preparation purposes (in the same manner as level 1+ spells)?

First, an acknowledgment: yep, I know this is a homebrew rule, and yep I know it's not how the 5E system is built (RAW). But, with 5E 2.0 on the way, it's got more folks thinking about tweaks and overhauls...so, it seemed a more timely puzzle as we head into the holiday season.

It's always struck me as odd that a wizard capable of casting the complexity of a Fireball or Plane Shift could only know a handful of the most minor spells. Don't get me wrong, I understand the logic is supposed to be: they don't prep them, they're always prepped, and that's the trade-off.

Sure. That could work. Or, we just draw on some At-Will magic from 4E, but remember our Vancian roots, and make the caster choose which cantrips/(at-will) spells they have prepared. So, I just use the "Cantrips Known" as a "Cantrips Prepared" limit and include Level 0 spells in an enemy's spellbook(s) or as available from patrons as training, etc., just like level 1+ spells. But, the mechanics of the Actions tab is clunky for this.

My current workaround is as such:

1) Create a new power group on the PC's character sheet's Actions tab "Spells [Cantrips (N)]" (where N is the number they can prepare each day)
* This is an ABILITY type group, as SPELL recognizes them as cantrips
* Cantrips, as a Spells category doesn't let me hide the spells that aren't prepped (as prep does for Level 1+)
2) Shift the Actions Tab to the Preparation view and mark all of the Cantrips as 1 DAILY
3) Swap back to Standard or Combat view - all cantrips now have the little use toggle dot in front of their names.
4) The Player then "selects" the cantrips they want for the day by "using" the ones they don't want. Thus marking them as 1-time used for the day and hiding them.

Sure, we could forgo all of this, and allow the PCs to "just remember which are prepared"...and in one of my two groups, that would probably work - they picked up FGU very quickly and even propose their own Effect actions. But, the second group (which has more casters), they have trouble remembering where the Actions Tab is - let alone how to cast a spell. I've had to make "How To" videos for basic FGU features (like logging in, or choosing their character, or targeting an enemy). They struggle with remembering to swap from Preparation to Standard/Action as it is. So, a list of all available Cantrips is, well, overwhelming.

I've not harped on them much. But they get frustrated when I say, "Are you sure you have Guidance? You've used 4 different cantrips already. Which one of those wasn't prepared? Eh?" Thus my question. Because choosing and then hiding those which aren't available allows them the Vancian Utility of preparation, but doesn't undermine choice 100%.