Epsilon The Magnet Warrior (BACH-EN020)

If this card is Normal or Special Summoned: You can send 1 Level 4 or lower "Magnet Warrior" monster from your Deck to the GY, except "Epsilon The Magnet Warrior"; this card's name becomes the sent monster's name (until the End Phase), then you can Special Summon 1 "Magnet Warrior" or "Magna Warrior" monster from your GY with a different name than the cards you control. You can only use this effect of "Epsilon The Magnet Warrior" once per turn.

Rock / Effect, Battle of Chaos