Yu-Gi-Oh! GX Duel Academy Puzzle: 024

1. Activate Scapegoat.

2. Equip Cannon Soldier with United We Stand.

3. Activate Limiter Removal.

4. Enter Battle Phase and attack Master of Dragon Soldier with Cannon Soldier.

5. Enter Main Phase 2, and use Cannon Soldier's effect to sacrifice all of the monsters, including Cannon Soldier (but sacrifice him last, of course).