So, one of my players has recently asked me if they could use misty step with the wizard's Spell Mastery feature to effectively increase their travel speed by 30ft/6 secconds. Effectively doubling default travel pace.
At 18th level, you have achieved such mastery over certain spells that you can cast them at will. Choose a 1st-level wizard spell and a 2nd-level wizard spell that are in your spellbook. You can cast those spells at their lowest level without expending a spell slot when you have them prepared. If you want to cast either spell at a higher level, you must expend a spell slot as normal.
By spending 8 hours in study, you can exchange one or both of the spells you chose for different spells of the same levels.
Misty step says:
You teleport up to 30 feet to an unoccupied space that you can see.
I am not asking if the spell can be used mid-combat to increase movement, only for long-distance travel. As far as I could find there are no rules anywhere saying that he could not, but it just feels wrong so I was not sure.