"Elemental HERO Wildheart" + "Elemental HERO Necroshade" Must be Fusion Summoned and cannot be Special Summoned by other ways. When this card is Special Summoned: Target 1 monster your opponent controls; destroy that target, then Special Summon 1 monster from your opponent's Graveyard to their side of the field.
This card allows you to destroy opponent’s set monster as well, potentially avoiding their flip effects.
You can Special Summon weaker monsters from your opponent’s Graveyard to the Field so that you can deal good damage by attacking into it.
You can Special Summon strong monsters from your opponent’s Graveyard to the Field and take control of it instead, using Enemy Controller, to deal damage to your opponent.
You are most likely required to use Polymerization to Fusion Summon, therefore you can use these cards to support your Fusion actions.
Fusion Recycling Plant can recycle 1 fusion material monster to your hand, and also search for Polymerization from your deck. King of the Swamp can be treated as 1 fusion material required for Fusion Summon, and at the same time it also can be used to search 1 Polymerization from your Deck.
Fusion Sage can search 1 Polymerization from your deck. De-Fusion is a powerful follow-up card when you attack with your Fusion monster, as it can dissolve the Fusion monster to resummon the Fusion materials from your Graveyard, enabling you more attack options.
Fusion Reserve allows you to add 1 of the Fusion materials listed on the Fusion monster to your hand, and add 1 Polymerization from your Graveyard to your Hand.
You can use this card to Fusion Summon Elemental Hero Necroid Shaman, which in turn prevents you from Special Summoning for the rest of the turn, therefore Elemental Hero Necroid Shaman cannot Special Summon 1 monster from your opponent’s Graveyard via its own effect.
Beatdown! This turn, the ATK of all face-up monsters on your field increases by the number of monsters of Level 5 or higher on your field times 300. This skill can only be used once per turn
Where the Heroes Dwell Can be used after you Life Points are 3000 or below. Play the Field Spell "Skyscraper". If there already is Field Spell on your side of the Field, Return it to your hand. This skill can only be used once per duel.
Master of Fusion Can be used each time your Life Points decrase by 1800. In the Draw Phase, instead of doing a normal draw, one Polymerization Spell Card, from outside of your Deck, is added to your hand.