A new Field Spell Card that supports Fusion centric Decks appears as the RATE Sneak Preview Promotional card!. Also, a picture of the mat.

Fusion Recycling Plant

Field Spell Card

Once per turn: You can discard 1 card; add 1 “Polymerization” from your Deck or Graveyard to your hand. Once per turn, during the End Phase: You can target 1 monster in your Graveyard that was used as a Fusion Material for a Fusion Summon this turn; add it to your hand.

The Mat you can get at the Sneak Preview

For further details on how to get both, check here.