Tomonoshin will be unrestricted, and Obstruct put to 1! Check out the details on the official site.
Retainer of the Demonic Dragon, Destructor
Size 0 Monster
Power: 2000 / Critical: 1 / Defense: 1000
■ "Finalizer" During your turn, when this card enters the field, if your flag is "Dragon Zwei", you may pay 2 life. If you do, draw two cards. "Finalizer" can only be activated once per turn.
Questions & Answers
Q2372: If you "Belost" on "Dragon Zwei", can I use "Finalizer" of "Retainer of the Demonic Dragon, Destructor" to draw cards?
A: No, you cannot. "Lost World" gets the abilities of "Dragon Zwei", but not the card name. Therefore, the "if your flag is Dragon Zwei" condition of "Finalizer" is not fulfilled.