Elemental HERO Gaia (BLC1-EN154) [Battles of Legend: Chapter 1]

1 "Elemental HERO" monster + 1 EARTH monster<br>Must be Fusion Summoned and cannot be Special Summoned by other ways. When this card is Fusion Summoned: Target 1 face-up monster your opponent controls; until the End Phase, its ATK is halved and this card gains the same amount of ATK.