What flaw: Fear of the "Wide Open"
What: Gossamer Aegis
How: Make it

• Phase Spider Silk
• Fail Snail Anti-magic Shell

Do: Locate a Phase Spider
L5 (3) - Tunnel Rat, Reading the Signs, Creature Lore → L2
1d20 → 20 (Mastery)

I find a phase spider and its freshly killed and still harvestable.

Do: Harvest Phase Spider Silk Gland
L5 (3) - I Can Use That, Harvesting Anatomical Insight, Creature Lore → L2
1d20 → 20 (Mastery)

I harvested the Spider Silk Gland

Do: Locate a Fail Snail
L5 (3) - Tunnel Rat, Reading the Signs, Creature Lore → L2
1d20 → 15

I found a Fail Snail

Combat

Phase 1:
L5 (3) - Improvises, Creature Lore → L3
1d20 → 7 → Ease by 1 + Strain

Phase 2: Use Mimic Glue to make the Snail immovable
L5 (3) - Easy by 1, Improvise, Creature Lore → L2
1d20 → 13

The mimic glue stuck the snail to the ground

1d20 → 16 (mimic glue not depleted)

Phase 3:
L5 (3) - Easy by 1, Improvise, Creature Lore, Detect Weaknesses → L1
1d20 → 5 → Ease by 1

Phase 4:
L5 (3) - Easy by 1, medium armor 2, Can't Sit Still → L1
1d20 → 1 (Mastery) → Hinder by 2

Phase 5:
L5 (3) - Easy b 1, Hinder by 2, Reading the Signs, Obsessive → L4
1d20 → 12 Success + Strain

Do: Harvest Fail Snail Shell
L5 (3) - I Can Use That, Harvesting Anatomical Insight, Creature Lore → L1
1d20 → 9

I successfully retrieved the Fail Snail Shell

Do: Craft Gossamer Aegis
L10 (5) - Improvise, Litter Tech, Monsterwright, Tinkerer 3 → L4
1d20 → 13

I successfully made the Gossamer Aegis