Conduction Warrior Linear Magnum Plus Minus

Cannot be Normal Summoned/Set. Must first be Special Summoned (from your hand) by sending 2 "Magnet Warrior" monsters whose original Level is 4 or lower from your hand, Deck, and/or face-up field to the GY. You can only Special Summon "Conduction Warrior Linear Magnum ±" once per turn this way. You can target 1 other EARTH monster on the field; this card gains ATK equal to half that monster's until the end of this turn. If this card is destroyed and sent to the GY: Add it to your hand. You can only use each effect of "Conduction Warrior Linear Magnum ±" once per turn.