| Rainbow bridge costs too much for too little of an effect.
Phantom Steed for example, a third level sorcerer spell lasts 1 hour per level, and by 14th level, it can fly for the entire duration at a speed of 240 feet per round for 14 hours.
A round is six seconds, so 2400 feet per minute. 60 minutes in an hour, so 2400 x 60 = 14400. And then the duration is 14 hours so, a total of 2016000 feet per casting.
That's 381.81 miles per casting. Rainbow bridge at 14th level gets 3.5 miles at a very limited duration for the cost of 500 gold piece gems. |