misty quest
All crit elixirs from tier 3 to 5 require blue_skies:ventium_gem as a reagent, but there is no such item in the game, so it is replaced with minecraft:air. (Checked this recipe, it is not working since 1.0.0, latest working version is 0.9.5, where it required blue_skies:diopside_gem instead)
pulsar viper