You cast the inscribed Wall Spell, conjuring the Wall into a space within range.
The caster’s Tier of the Spell is equal to the Scroll’s Tier.
There is no limit to the number of Wall spells you can have active that are cast from this kind of Scroll.
If the Scroll is Tier 1 or higher, you can apply 2 charges worth of Mana Flux in Metamagics to the Spell or Technique per Tier of the Scroll, chosen from the Metamagics inscribed on the Scroll.
Once you learn this Formula, you can inscribe any Wall Spell with an elemental tag matching one of your Affinities into a Scroll.