Eventide Petals - Midnight Zenith skill not scaling with spell modifiers

Eventide Petal's triggered skill was teased in the league reveal as dealing "devastating damage" on a spell casting build, but it seems the "spell" tag was forgotten on the skill. Spell damage mods and Spell skill level mods do not apply to the ice crystals (plus their base damage is quite low) so it is functionally impossible to get them to deal meaningful damage on a caster build.

Please add the "Spell" tag to this skill, as it was clearly intended to be scaled this way when revealed.