I think the difference between cloudkill and the Dragonborn’s breath weapon have been sufficiently explained, but if you still aren’t clear, please ask.
As DaftGenius said, any race can be any class. If you used the Dragonborn race, you still get a +1 to your Charisma score. The +2 to strength doesn’t really help you, true, but you could use it to offset a low roll or the lowest number if you are using standard array.
If your DM would allow a homebrew race, and if you really wanted to combine the Tiefling and Dragon ancestry I would suggest replacing the Tiefling’s Infernal Legacy trait with the Dragonborn’s breath weapon trait. I’m no expert on balance, but I’m confident it is more balanced than giving your character cloudkill once per day.
Keep in mind that there is no guarantee that your character would be able to obtain a wand of web. The official take on magic items in 5e is that there are not magic shops where you can buy items (outside of healing potions). They generally have to be found while adventuring. That said, 5e allows and encourages DMs to make the rules their own, so that can vary from table to table.
I think the difference between cloudkill and the Dragonborn’s breath weapon have been sufficiently explained, but if you still aren’t clear, please ask.
As DaftGenius said, any race can be any class. If you used the Dragonborn race, you still get a +1 to your Charisma score. The +2 to strength doesn’t really help you, true, but you could use it to offset a low roll or the lowest number if you are using standard array.
If your DM would allow a homebrew race, and if you really wanted to combine the Tiefling and Dragon ancestry I would suggest replacing the Tiefling’s Infernal Legacy trait with the Dragonborn’s breath weapon trait. I’m no expert on balance, but I’m confident it is more balanced than giving your character cloudkill once per day.
Keep in mind that there is no guarantee that your character would be able to obtain a wand of web. The official take on magic items in 5e is that there are not magic shops where you can buy items (outside of healing potions). They generally have to be found while adventuring. That said, 5e allows and encourages DMs to make the rules their own, so that can vary from table to table.
Trying to Decide if DDB is for you? A few helpful threads: A Buyer's Guide to DDB; What I/We Bought and Why; How some DMs use DDB; A Newer Thread on Using DDB to Play
Helpful threads on other topics: Homebrew FAQ by IamSposta; Accessing Content by ConalTheGreat;
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