When a Fusion Monster on the field is destroyed and sent to the Graveyard, you can Special Summon from your Graveyard 1 of the Fusion Material Monsters that you used for the Fusion Summon of that Fusion Monster.
For some dumb 🔥 reason this card NEVER works. I've tested it many many times and it NEVER works. I've used normally fusion summoned monsters, I've used the Hex-Sealed Fusion monsters, everything. It NEVER works. Busted 🔥 piece of 🔥.