You can use this Skill's second effect once per Duel.
1: You cannot Special Summon (excluding Special Summons from the Extra Deck) any monsters except LIGHT, DARK, and WIND Cyberse Type monsters.
2: If you control a Cyberse Type Link Monster, send 1 "Firewall Dragon" from your Extra Deck to the Graveyard. (This card can be Special Summoned.) Then, you can apply the following effect.
- Shuffle 1 card from your hand or field to your Deck, and then play 1 "Firewall Guardian" from your Deck to your field in face-down Defense Position. (Its battle position can be changed.)