Mana Bolts has some weird new combo with Void Surge for some reason. It summons a Snowlion properly when casting Mana Bolts after using Void Surge, however the Snowlion (the same one as Ghastly Pact ability) doesn't do any damage, apply any buffs, cause any knockback, or appear in the combat log at all.

This is actually a live combo on KR version, so not sure if they fixed it already, but it's currently not working in PTS.

Also, the combo probably shouldn't say "summons additional* snowlions" and instead say "Summons a snowlion".