Advanced format ruling
Elemental HERO Terra Firma
Card effect (current official text)"Elemental HERO Ocean" + "Elemental HERO Woodsman"
Must be Fusion Summoned and cannot be Special Summoned by other ways. You can Tribute 1 face-up "Elemental HERO" monster; this card gains ATK equal to the Tributed monster's ATK, until the End Phase.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.