← Designer’s Kit

Mission 9 of 16

Area-of-Effect Geometry

📋 What it is

Spells and blasts cover shapes on the grid — circles, cones, lines — and geometry tells you exactly which squares they hit.

🗣️ Coach says

A fireball is geometry with a bang. An area-of-effect (AoE) spell covers a shape — a circle, cone or line — and you use geometry to work out exactly which squares it hits. Place it well and you catch three enemies; badly and you hit a wall.

🧠 Memory hook

AoE = a shape on the grid (circle/cone/line). Geometry = which squares get hit.

😂 Giggle

Why is the d20 the most popular dice at the party?
Because it always brings 20 sides to every story!

😲 Whoa!

A well-placed circular blast can hit several enemies at once, while a badly-aimed one might catch only empty squares — geometry decides.

✅ Quick check: How does geometry help a player use an “area-of-effect” spell well?

Say your answer out loud first — then reveal.

🧪 Try it! (2 minutes)

Draw a small circle over a grid — count how many squares it covers.

⭐ Do the round to earn your star →
🤸 Brain break: Blast shape: “throw” a fireball and spread your fingers into a circle of effect.