GreatestHonor
Explorer
I saw in older editions of DND that a wizard could spend downtime crafting new spells, and this is supported in lore. Unfortunately there are no official rules for doing so in 5th edition, so i took the time to put this together. Its still a rough draft, so any feedback would be appreciated.
To create a new spell you must have at least one spell slot of equal or higher level than the spell level of the spell you are attempting to create, and you must have access to and craft the new spell in a safe location during the entirety of its creation.
When determining elements of a spell work with your GM and compare your creation with other spells as well as the rules for creating spells in the DMG (Creating a Spell, pg. 283-284) to ensure your new spell is appropriate for the proposed level and to make any changes or alterations to it that are needed. Other factors may determine whether or not a spell is appropriate, such as the campaign’s setting, or if it would make more sense s a cleric spell, both of which are at the GM’s discretion.
You must make a Arcana check equal or exceeding the DC at the end of every 10 weeks (rounded down, minimum of once), or you do not advance the creation of the new spell for that week. If you fail this check by 5 or more, roll once on the Arcane Disaster table for the appropriate level of the spell. If you fail the check by 10 or more, roll 1d4 (minimum of 1) times.
=====ARCANE DISASTER TABLE YET TO BE MADE=====
Cantrips & Level 1
2nd & 3rd
4th & 5th
6th, 7th, and 8th
9th
When you create a new spell you are—at least initially— the only one that knows it. Others can attempt to learn it or copy it from your spellbook given enough time and resources. With this new spell you find you have gained an innate mastery over it, gaining the following benefits:
After expending a created spell’s innate uses, you can cast the spell again by using a spell slot of an appropriate level.
Also, because cantrips can already be casted indefinitely and do not require material components, you instead can cast a cantrip you create as a bonus action.
Game Masters. This table can also be used by you for NPCs, such as archmages who have created their spells.
To create a new spell you must have at least one spell slot of equal or higher level than the spell level of the spell you are attempting to create, and you must have access to and craft the new spell in a safe location during the entirety of its creation.
When determining elements of a spell work with your GM and compare your creation with other spells as well as the rules for creating spells in the DMG (Creating a Spell, pg. 283-284) to ensure your new spell is appropriate for the proposed level and to make any changes or alterations to it that are needed. Other factors may determine whether or not a spell is appropriate, such as the campaign’s setting, or if it would make more sense s a cleric spell, both of which are at the GM’s discretion.
Cost and Time per Spell Level| Level | Cost (sp) | Time (Workweeks) | Arcana DC |
| Cantrip | 1,000 | 1 | 12 |
| 1st | 5,000 | 3 | 13 |
| 2nd | 10,000 | 5 | 14 |
| 3rd | 30,000 | 10 | 15 |
| 4th | 60,000 | 15 | 16 |
| 5th | 125,000 | 20 | 17 |
| 6th | 200,000 | 30 | 19 |
| 7th | 350,000 | 40 | 21 |
| 8th | 500,000 | 50 | 23 |
| 9th | 750,000 | 60 | 25 |
You must make a Arcana check equal or exceeding the DC at the end of every 10 weeks (rounded down, minimum of once), or you do not advance the creation of the new spell for that week. If you fail this check by 5 or more, roll once on the Arcane Disaster table for the appropriate level of the spell. If you fail the check by 10 or more, roll 1d4 (minimum of 1) times.
=====ARCANE DISASTER TABLE YET TO BE MADE=====
Cantrips & Level 1
2nd & 3rd
4th & 5th
6th, 7th, and 8th
9th
When you create a new spell you are—at least initially— the only one that knows it. Others can attempt to learn it or copy it from your spellbook given enough time and resources. With this new spell you find you have gained an innate mastery over it, gaining the following benefits:
- A spell you created is always prepared and does not count towards the number of spells you can prepare.
- Depending on your wizard level and the level of the spell, you can cast the new spell a predetermined number of times each day without expending a spell slot or requiring material components, as detailed in the table below:
| Wizard Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 1 | 1 | ||||||||
| 2 | 1 | 1 | |||||||
| 3 | 1 | 1 | |||||||
| 4 | 2 | 1 | |||||||
| 5 | 2 | 1 | 1 | ||||||
| 6 | 2 | 2 | 1 | ||||||
| 7 | 3 | 2 | 1 | 1 | |||||
| 8 | 3 | 2 | 2 | 1 | |||||
| 9 | 3 | 3 | 2 | 1 | 1 | ||||
| 10 | 3 | 3 | 2 | 2 | 1 | ||||
| 11 | 4 | 3 | 3 | 2 | 1 | 1 | |||
| 12 | 4 | 3 | 3 | 2 | 2 | 1 | |||
| 13 | 4 | 4 | 3 | 3 | 2 | 1 | 1 | ||
| 14 | 4 | 4 | 3 | 3 | 2 | 2 | 1 | ||
| 15 | 5 | 4 | 4 | 3 | 3 | 2 | 1 | 1 | |
| 16 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 1 | |
| 17 | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 1 | 1 |
| 18 | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 1 |
| 19 | At-Will | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 1 |
| 20 | At-Will | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 1 |
After expending a created spell’s innate uses, you can cast the spell again by using a spell slot of an appropriate level.
Also, because cantrips can already be casted indefinitely and do not require material components, you instead can cast a cantrip you create as a bonus action.
Game Masters. This table can also be used by you for NPCs, such as archmages who have created their spells.
