Fusion Summon 1 "Elemental HERO" Fusion Monster from your Extra Deck, by shuffling your banished Fusion Materials listed on it into your Deck. You cannot Special Summon monsters except by this card's effect, during the turn you activate this card.
Elemental HERO Flash has an effect that allows you to banish this card and 3 “Elemental HERO” monster cards from your Graveyard, and target 1 Normal Spell Card (can be Polymerization) in your Graveyard, and add that to your hand. This is a setup for you to use Parallel World Fusion. Similarly, Soul Release is able to banish up to 5 cards from your Graveyard, setting you up to use Parallel World Fusion.
This card can be challenging to use, but is able to turn the tide of the board to your favor. Suggested to use at most 2 copies in your Deck.
Returns from your Banished Zone to your Main Deck / Returns from your Banished Zone to your Extra Deck / Fuses Materials from your Banished Zone
Fusion Summons / Special Summons from your Extra Deck / Prevents your Special Summons
If you use Aloof Lupin you can fusion summon in 1 turn.
I don't know which E-hero this should be used for however.
The compatible E-heros aren't the strongest ones because the strongest E-hero don't list names on them.