Magnet monster

Magnet monster is a term used in the manga to describe monsters with the ability to fuse with each other, without the use of an additional card to perform the Fusion Summon.

The term was used by Dark Yugi to describe the XYZ cards, "X-Head Cannon", "Y-Dragon Head" and "Z-Metal Tank", which fused into "XY-Dragon Cannon" and "XYZ-Dragon Catapult Cannon". The "Magnet Warrior" cards, "Alpha", "Beta and "Gamma", which can combine into "Valkyrion the Magna Warrior" also fit this description.