5e has a luxuriously complete spell list, and an absurdly small number of its spells have the ritual tag. Bards, clerics, and druids have over 100 spells each, and each of these classes has exactly 12 ritual spells – about 10%. Wizards, who have the biggest spell list at 213 spells, have 17 rituals, which is only 8% of their list. Sorcerers have four rituals. Warlock is the worst offender because it has a big class feature and invocation devoted to collecting ritual spells – but it’s a trap. Of its four rituals, three are first level.
The dearth of rituals makes me think that they’re priced wrong. WOTC realized that their generous ritual rules (cast a spell free in ten minutes) led to abuses with too many spells. They pulled back and now only 10% of the spells are ritualizable.
This compares unfavorably with my original hope for spells: every spell can be cast as a ritual!
I think this dream is still possible if we tweak the cost. +10 minutes is clearly too low a cost. Money (as in 4e) is too high a cost. What about adding arbitrary restrictions instead of cost?
As before, you can cast any known spell as a ritual, whether or not it’s prepared, by adding 10 minutes. New rule: you can ritually cast a number of spell levels equal to your character level. This refreshes on a short or long rest. You can only ritually cast one spell of level 6 or higher per day.
What do we do with the few official ritual-tag spells that WOTC thinks are safe, un-spammable, and OK to cast unlimited times a day? Let’s let them be cast unlimited times without costing any ritual spell levels, as in the official rules.
So how open is this to abuse? Not very, I think. Cast a Fireball as a ritual? Sure, useful for a few free lobs in slow-paced siege warfare. Cure Wounds as a ritual? Sure, it gives clerics a nice, limited apply-herbs thing to do out of combat. Wish as a ritual? Yeah, once a day. What about the fact that any spell is now open to ritual dabblers, like warlocks and users of the Ritual Caster feat? I’m fine with it. If a barbarian wants to spend a feat on Ritual Caster so he can cast Bear’s Endurance or Fireball a few times a day, I’ll allow it.