Yu-Gi-Oh! GX Duel Academy Puzzle: 077


 * Destroy Red Gadget - Stronghold with Mystical Space-Typhoon.
 * Use Shield Crush on one of the defensive monsters.
 * Summon Drillroid, revive Rare Metal Dragon with Premature Burial.
 * Attack the last defender with Drillroid (destroyed by effect) and attack directly with the dragon.