Firewall Phantom (MP24-EN185) [25th Anniversary Tin: Dueling Mirrors]

If this card is sent to the GY as material for the Link Summon of a Cyberse monster: You can add 1 "Cynet" Spell/Trap from your Deck to your hand, then discard 1 card. You can banish this card from your GY; during the End Phase of this turn, shuffle 1 Cyberse monster from your GY into the Deck. You can only use each effect of "Firewall Phantom" once per turn.