"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.
It is the recommended combo to swarm your opponent’s with HERO’s bond spell, then use R-Righteous Justice to eliminate their backrow. This also provides options for Terra Firma to tribute 1 face-up Elemental Hero monster and gain ATK equal to the tributed monster until End phase. Using Hero Barrier can protect your Terra Firma from your opponent’s attack.
Blazeman and King of the Swamp can be very useful to get Polymerization out fast. Since De-Fusion is a quick play spell, during your battle phase, you can attack with Terra Firma first, De-Fusion on Terra Firma, special summon Woodsman and Ocean to continue your attack. During your next standby phase, Woodsman and Ocean provides excellent card advantage with their respective effects.
Wow. The highlight monster on the box looks mediocre at best, not helping things is that the elemental heroes in the current library suck. I mean it has the highlights of Jaden’s deck, but what makes the Elemental Heroes so good in my opinion is how they are so versatile with many monsters requiring only an elemental hero and a certain attribute monster like Nova Master, Great Tornado, Gaia, and even Absolute zero.
And I simply cannot work with the Hero box released. It just sucks so much.
(Frankly with the exception of Crowler and his Ancient Gear archetype Deck, I find most GX characters to be kind of a letdown)