Sword of Spirit
Legend
I divide all costs associated with consumable items by 20. It seems to fit well.
Attempting to clear up any confusion caused by this post:Just to ward away confusion, potions require an action to use and the potion of invisibility requires concentration, as (no concentration required) is not listed within its description. But, yes, crafting cost and time required is rather prohibitive. Maybe if the PCs have too much gold and too much time.
Attempting to clear up any confusion caused by this post:
The Potion of Invisibility does not require concentration.
Its effect is not to allow you to cast the Invisibility spell (which would require concentration unless stated otherwise). Its effect is simply to turn you invisible.
Briefly-
A potion can have an effect that is a spell effect, or not. Let's use "flying" as an example.
If the potion says (pace gaseous form) that it gives you the effect of a "fly" spell, then it defaults to the DMG rules re: duration, casting, concentration.
If it just lets you fly without referencing a spell, it doesn't. Since the potion lets you fly, without explicitly invoking a spell, it does not require concentration.
Clear?
So there's three types of potions when it comes to concentration-
1. Those that mention a spell explicitly. These require concentration if the spell requires concentration.
2. Those that mention a spell explicitly, but state "(no concentration required)". These do not require concentration.
3. Those that do not mention a spell explicitly, or do not state you are gaining the effect of a spell. These do not require concentration.
Make more sense now? Apply this taxonomy to invisibility.