yugioh anti banish cards Crystron Cluster Yu-Gi-Oh: 10 Trap Cards That

With an effect that lets you bring back any basic energy or a Pokemon card (regardless of stage) from your discard to your hand is pretty broken, especially in the current standard meta

St Marcus Mars (OP13-091) OP13 Special Rare (SP) St Ethanbaron V Nusjuro (OP13-080) OP13 Special Rare (SP) St Jaygarcia Saturn (OP13-083) OP13 Special Rare (SP) St Topman Warcury (OP13-089) OP13 Special Rare (SP) St Shepherd Ju Peter (OP13-084) OP13 Special Rare (SP) Portgas D Ace (OP13-002) OP13 Leader Alt Art (AA) Monkey D Luffy (OP13-001) OP13 Leader Alt Art (AA) Edward Newgate (OP13-042) OP13 Alternate Art (AA) Gol D Roger (OP13-003) OP13 Leader Alt Art (AA) Imu (OP13-079) OP13 Leader Alt Art (AA) St Marcus Mars (OP13-091) OP13 Alternate Art (AA) Five Elders (OP13-082) OP13 Alternate Art (AA) Jewelry Bonney (OP13-108) OP13 Alternate Art (AA) St Shepherd Ju Peter (OP13-084) OP13 Alternate Art (AA) St Jaygarcia Saturn (OP13-083) OP13 Alternate Art (AA) St Ethanbaron V Nusjuro (OP13-080) OP13 Alternate Art (AA) Yamato (OP13-054) OP13 Alternate Art (AA) Ace & Sabo & Luffy (OP13-007) OP13 Alternate Art (AA) Sabo (OP13-004) OP13 Leader Alt Art (AA) St Topman Warcury (OP13-089) OP13 Alternate Art (AA) Gol D Roger (OP13-064) OP13 Alternate Art (AA) Jewelry Bonney (OP13-100) OP13 Leader Alt Art (AA) Lilith (OP13-113) OP13 Alternate Art (AA) Stussy (OP13-110) OP13 Alternate Art (AA) Boa Hancock (OP13-051) OP13 Alternate Art (AA) Shanks (OP13-028) OP13 Alternate Art (AA) Sanji (OP13-027) OP13 Alternate Art (AA) Monkey D Garp (OP13-016) OP13 Alternate Art (AA) S-Snake (OP13-114) OP13 Alternate Art (AA) Silvers Rayleigh (OP13-066) OP13 Alternate Art (AA) Shanks (OP13-065) OP13 Alternate Art (AA) Uta (OP13-023) OP13 Alternate Art (AA) PRB-02: The Best Vol

Aki used it to flip a monster face down, which can be done by any number of cards, including the very legal Book of Moon

Yes, a card with no mana cost has a converted mana cost of 0