During the Main Phase: Activate 1 of these effects (but you can only use each effect of "Magnet Bonding" once per turn);
● Add 1 "Conduction Warrior Linear Magnum Plus Minus" or 1 Level 4 or lower "Magnet Warrior" monster from your Deck to your hand.
● Add 1 Level 8 "Magna Warrior" monster from your Deck to your hand.
● Fusion Summon 1 Rock Fusion Monster from your Extra Deck, by shuffling Rock monsters from your hand, field, GY, and/or banishment into the Deck as material.
