5e - Effects that increase caster stat increase spell to hit but not spell save DC

[LillySprout]

What the title says.

[mdrichey]

It would be nice if the ATK effect had valid "spell" and "weapon" descriptors, but it does not; the only valid descriptors are "melee", "ranged" and "opportunity". If the caster only ever uses spell attacks and never weapon attacks, then ATK: 1 (or whatever number) is sufficient.

You can also edit the spell group in the Actions tab of the PC sheet, and add a +1 (or whatever number) bonus to attack but not to Save DC.

[Zacchaeus]

What the title says.

See the graphic for how to do this.