"Cyber Dragon Drei" can be banished to activate its effect and to protect your "Cyber Dragon" on the field from destruction.
Use "Cyber Dragon Core" to search for this card and protect it for a turn.
Destroy this card during your opponent's End Phase to Special Summon multiple monsters while also not losing your Battle Phase.
In order to maximize the amount of monsters banished by this card, activate this card during your turn, after your Standby Phase. When this card is used during your every turn, up to 7 monsters will be banished.
Remember that because this is a Trap Card, its effect is a Spell Speed 2 and can be activated during your opponent's turn or during your Draw Phase before this card would be destroyed.
LIGHT Machine-Type monsters that can be Special Summoned after being banished from the Main Deck: