I've been working on an alternative magic system for 5e which I call 'Spell Dice'. Instead of spell slots being a fixed number, it is determined by a roll of the dice, which increases at certain level milestones. The idea based off the proficiency dice variant rule from the DMG, with the intention of making magic more capricious.
Here's a rough draft of what I've got so far, I'd love to hear your thoughts on it.
Sorcerer/Wizard/Cleric/Druid Table
Level
|
Casting Dice
|
Advancement
|
1st
|
1d4
|
Increases to 1d6 at level 5, and 1d8 at level 9
|
2nd
|
1d4
|
Increases to 1d6 at level 7, 1d8 at level 11
|
3rd
|
1d4
|
Increases to 1d6 at level 9
|
4th
|
1d4
|
1d6 at level at level 11
|
5th
|
1d4
|
1d6 at level 18
|
6th
|
1
|
1d4 at level
|
7th
|
1
|
No Increase
|
8th
|
1
|
No Increase
|
9th
|
1
|
No Increase
|
Eldritch Knight/Arcane Trickster Table
Level
|
Casting Dice
|
Advancement
|
1st
|
1d4
|
Increases to 1d6 at level 4, and 1d8 at level 7
|
2nd
|
1d4
|
Increases to 1d6 at level 10
|
3rd
|
1d4
|
Increases to 1d6 at level 16
|
4th
|
1
|
No increase
|
Paladin/Ranger Table:
Level
|
Casting Dice
|
Advancement
|
1st
|
1d4
|
Increases to 1d6 at level 3, and 1d8 at level 5
|
2nd
|
1d4
|
Increases to 1d6 at level 7
|
3rd
|
1d4
|
Increases to 1d6 at level 11
|
4th
|
1
|
Increases to 1d4 at level 15, 1d6 at level 17
|
5th
|
1
|
Increases to 1d4 at level 19
|
Bard: Cantrip Dice starts at 1d4, increases to 1d6 at level 4, and 1d8 at level 10
Cleric: Cantrip dice starts at 1d6, increases to 1d8 at level 4, and 1d10 at level 10
Druid: Cantrip Dice starts at 1d4, increases to 1d6 at level 4, and 1d8 at level 10
Eldritch Knight/Arcane Trickster: Cantrip dice starts at 1d4, increases to 1d6 at level 10.
Sorcerer: Cantrip dice starts at a 1d8, increases to a 1d10 at level 4, and a 1d12 at level 10
Warlock: Cantrips dice starts at a 1d4, increases to 1d6 at level 4, and a 1d8 at level 10. Additionally, Warlocks begin using 1d4 as their casting dice. It increases to a 1d6 at level 11, and a 1d8 at level 17.
Wizards: Cantrip dice starts at a 1d6, increases to 1d8 at level to a 1d10 at level 10
Additional Rules:
Starting at level 7, Warlocks and Wild Magic Sorcerers can spend one of their Hit Dice to re-roll their spell casting dice. They can only do this once per short rest and must keep the new roll, even if it is lower than the original.
I've also come up with a feat to supplement this variant system.
Rapid Resumption
Prerequisite: Spell casting score of 13 or higher, ability to cast 2nd level spells
- Choose one spell level that is lower than the highest level spell you can cast. When rolling for spell slots, you can roll that spell dice twice and take either result. This can only be done once per long rest.
This feat can be taken multiple times, and applies to a different spell level each time. If your character is a warlock, it applies to all of your spells regardless of level.