Harvestable Shroud inside Altar of the Flame Radius

I would like a tool that allows you to collect Shroud Spores (and Shroud Particles, in level-appropriate areas) by harvesting Shroud within an Altar of the Flame's overall area-of-effect. As terrain deformation is already permanent within the cube range of an Altar of the Flame, this Shroud harvesting would be permanent (unless or until you move your Altar), and would provide an interesting alternative way to gather Shroud resource materials (volume should be low/m³, but also worthwhile when considering the sheer volume being cleared out).