"Rescueroid" + "Ambulanceroid" This monster cannot be Special Summoned except by Fusion Summon. Once per turn, when a monster on your side of the field is destroyed by battle and sent to the Graveyard, you can Special Summon that monster in Defense Position.
Can special summon monsters that are destroyed by battle once per turn.
Many decks can often get above 2300 attack to go over Ambulance Rescueroid.
Can only special summon a monster that's destroyed by battle.
Its effect to special summon your destroyed monster by battle can be very useful when used on monsters like Exploder Dragon. This will let you destroy your opponent's monster without losing any monster. You can recover 4 roid monsters by summoning Expressroid and crashing it into your opponent's attack position monster. It can also be good with cards like Warm Worm, or Dark Mimic LV3/Blue Dragon Summoner if you need some draws.