If "Cyber Dragon" is in your Graveyard: You can activate 1 of these effects. If you have 3 or more "Cyber Dragons" in your Graveyard at activation, you can activate both effects and resolve in sequence. You can only activate 1 "Cyber Repair Plant" per turn.● Add 1 LIGHT Machine-Type monster from your Deck to your hand.● Target 1 LIGHT Machine-Type monster in your Graveyard; shuffle that target into your Deck.
These are the monsters required to be in your Graveyard in order to activate Cyber Repair Plant. Currently Cyber Dragon is not available to the player base, therefore only Cyber Dragon Zwei is able to substitute for this condition.
You can use Cyber Repair Plant to search these monsters and add it to your hand. Worth noting that B-Buster Drake can be a good utility card to search out, as it can be equipped to your Cybernetic monsters and provides Spell immunity to them.
Proto-Cyber Dragon is only considered as “Cyber Dragon” when it is on the Field, and not when it is in the Graveyard.
Last Gamble Can be used in your Main Phase, starting from the fifth turn. Upon activation, reduces your LP to 100 and discards 2 cards from your hand. You roll a die and draw that number of cards. This skill can only be used once per Duel.