Inspired by this question, I wonder about the Monk feature (PHB p. 78):
Step of the Wind
... Your jump distance is doubled for the turn
And the jump spell (PHB p.254):
... the creature's jump distance is tripled ...
With regards to this rule (PHB p. 205):
Combining Magical Effects
The effects of different spells add together while the durations of those spells overlap. The effects of the same spell cast multiple times don't combine, however. Instead, the most potent effect - such as the highest bonus - from those castings applies while their durations overlap.
So, what happens if you do them both?
- x3 because they are the same and "don't combine" (not my favourite)
- x4 because they "add together" - 1 + 1 (double for SotW) + 2 (triple for Jump)
- x5 because they "add together" - x2 (SotW) + x3 (Jump) = x5
- x6 because they "add together" - (base value x2 for SotW) x3 for Jump
At my table it would be 2., or maybe 3. but then again I could go with 4.
I would like to see what support there is for other interpretations in the rules, published modules or other WotC info.