A Homebrewers’ “How-To” FAQ*

Just to save y'all the trouble, you cannot have the homebrew subspecies be nested under the homebrew species the way official stuff are.

You can make a subspecies of an official race and do it but not for homebrew species. That has never been a thing and is unlikely to become a thing due to D&D 5.5e moving away from subspecies.

Your best alternative is using the Options system to set the subspecies as Options instead of being set as subspecies - this is the way new 5.5e does them now, such as 5.5e version of Elf or Tiefling.

but for 17 what if the spells are already in an option like for tieflings you can choose your spellcasting abillity but you get different spells based on your legacy???

Quote from RoNoThwomp >>

but for 17 what if the spells are already in an option like for tieflings you can choose your spellcasting abillity but you get different spells based on your legacy???

 

The way they've done this on the official species that work like this is to have one set of three options that set the spellcasting ability, and then a separate set of options for the legacies where there's actually one for each combination of legacy and spellcasting ability (but only the ones pertinent to the chosen ability are shown).

For example, Tieflings have three legacy options: Abyssal, Chthonic, Infernal. The first set of options has the three spellcasting abilities: Intelligence, Wisdom, Charisma. The second set has nine options: Abyssal/Intelligence, Abyssal/Wisdom, Abyssal/Charisma, Chthonic/Intelligence, Chthonic/Wisdom, etc.

If you want to see the details of how to do this, create a new homebrew species using Tiefling as the template and take a look at how they've implemented it.

I'm trying to update a species feature description from legacy to 5.5e for the spells it grants, but don't know what text needs to change. I've swapped out the actual spell selections for the 5.5e versions already. I just want to the details page to have the right spell windows pop up when hovering over the spell names

Quote from baka_00 >>

I'm trying to update a species feature description from legacy to 5.5e for the spells it grants, but don't know what text needs to change. I've swapped out the actual spell selections for the 5.5e versions already. I just want to the details page to have the right spell windows pop up when hovering over the spell names

Change the tooltip tags from [spell] to [spells].

I am trying to add a feat that would allow Sorcerers to study/observe magic from various sources and "learn" those spells through DM decided criteria. I want the spells learned to appear in the character sheet and cost the typical resources, but I do not want them to count against the number of spells known by the class.

How can I accomplish this short of adding every individual spell as an option? When I tried adding the spell tables and checking "Is Infinite?" to allow multiple spells to be learned, each of them are coming up as "At Will".

Quote from LordEchoGG >>

I am trying to add a feat that would allow Sorcerers to study/observe magic from various sources and "learn" those spells through DM decided criteria. I want the spells learned to appear in the character sheet and cost the typical resources, but I do not want them to count against the number of spells known by the class.

How can I accomplish this short of adding every individual spell as an option? When I tried adding the spell tables and checking "Is Infinite?" to allow multiple spells to be learned, each of them are coming up as "At Will".

 
You cannot homebrew a feat to use spell slots. While there are official feats that can it uses backend stuff we cannot access. Spells added through feats are either "limited use" (cannot be spell slots) or at-will. 

You can do it as a subclass feature. Make a copy of subclass and then you can select the "is infinite", "counts as spell known: no" and "uses spell slot: yes".