After the expiration of the previous Duel Pass, the new Duel Pass for the next 80 days in Master Duel has been introduced. By leveling up the Normal Duel Pass to Level 50, you can obtain the following rewards:
-300 Gems
-30 UR points
-30 SR points
-30 R points
-27 N points
-1 Block Dragon Icon (at Level 50)

“An Icon depicting a monster that was assembled from building blocks. Vaguely resembles a dragon despite not actually being one.”

For the Duel Pass (Gold)

-100 UR points
-100 SR points
-80 R points
-80 N points
-700 Gems (recovering its price of 700 gems)

At Level 25, you can obtain a Yellow & Blue Frame

“A yellow and blue Icon Frame that evokes a golden sun rising over the sea. It calls to mind bright summer days with sparkling ocean waters set aglow by sunlight.”

At Level 50, you can obtain a Lacrima the Crimson Tears Wallpaper

“A peculiar Fiend known for her crimson tears. She requires amorous words in order to use her power to its fullest.”

At Level 75, you can obtain a Gem-Turtle Mate

“The Pyroxene Warriors, even-tempered knights with hearts that secretly yearn for justice. They possess the ability to fuse as they require.”

Furthermore, a collaboration campaign with eFootball was announced for Master Duel. The campaign will begin on October 6th and run until November 7th (time zones applying). The following rewards can be obtained through a login bonus and as event rewards:

Rescue Rabbit (alternative artwork, Royal Rare)
Rescue Rabbit (alternative artwork) Mate

Neymar Protectors/Sleeves
eFootball Protectors/Sleeves
Mate’s Base
eFootball Icon
Neymar Wallpaper
Rescue Rabbit (alternative artwork) Wallpaper

The note in finer print mentions that “some of the rewards can be obtained through an in-game event which begins on October 15th” (time zones applying).

Source.