yugioh card dragon master knight Yu-Gi-Oh! GB7-003 Ultimate Edition 2 Promo Value of limited edition dragon

They create value, but not overwhelming value the way something like Icetill does

If a spell with rebound that you cast from your hand doesn't resolve for any reason, including being countered, the spell will be put into its owner's graveyard and you won't get to cast it again on your next turn

A serialized card includes the total number of cards in that run plus a unique number to tell you where in that run the card falls

Then, it allows sources controlled by the owner that deal damage to an opponent or permanent to deal that much damage plus the number of fire counters of Fated Firepower, meaning that 3 counters would make a 1/1 creature deal 4 damage, instead

In short, Shichifukujin Dragon was created to commemorate the opening of the DCI Tournament Center and 1996 World Champion is exactly what it says - the card was created as a prize for the winner of that tournament (Tom Chanpheng)