As a level 2 Evocation Wizard, the School allows you to sculpt spells around allies, up to 1 + the spell's level, allowing them to avoid the effects of the spell. Certain spells, such as Thunderwave, allow you to cast them using a higher level spell slot.
My question is: which level do you use when calculating the amount of allies that can dodge your spell? The actual spell level (for Thunderwave, this is 2), or the level of the spell slot you use when casting (which effectively raises the level of the spell)?
Best Answer
The answer is the level of the spell slot you use to cast the spell. From the Player's Basic Rules, page 78:
When you cast magic missile as a 2nd-level spell, you are casting a 2nd-level spell. That casting, as the rules put it, is at the higher level. The level of the spell is the level you cast it at, for all effects that use the level of the spell.