All three of these accessories will be available until May 9th (time zones applying).

-New Tryout Duel: Extreme Duel/Skill Drain
This event will run from April 26th to April 30th (time zones applying). For this Tryout Duel, a copy of Skill Drain will be placed in both players’ Spell & Trap Zones at the start of the Duel.

The reward is not explicitly mentioned in the announcement, but the thumbnail suggests that it will be one pack from the latest selection pack: Nightmare Arrivals.

-Master Duel Proficiency Test: more grades added
Grades 11 to 15 have been added for the Master Duel Proficiency Test.

Grade 11:
-Academic exam: Answer 5 out of 8 questions correctly
-Practical exam: Inflict 100000 battle damage on your opponent
-Rewards: 5 Legacy Pack Tickets

(The following will be updated once we get information about them)

Grade 12:
-Academic exam: Answer 5 out of 8 questions correctly
-Practical exam: Special Summon a monster from the Graveyard 20 times
-Rewards: 5 Legacy Pack Tickets

Grade 13:
-Academic exam: Answer 5 out of 8 questions correctly
-Practical exam: Monsters on your opponent’s field are destroyed 20 times [IN BATTLE]
-Rewards: 5 Legacy Pack Tickets

Grade 14:
-Academic exam: Answer 5 out of 8 questions correctly
-Practical exam: Tribute Summon a monster 5 times, Synchro Summon a monster 5 times, Link Summon a monster 5 times
-Rewards: Knightmare Incarnation Idlee Icon

Grade 15:
-Academic exam: Answer 8 out of 10 questions correctly
-Practical exam: Duel 20 times, Banish your opponent’s cards 100 times
-Rewards: Mate’s Base: D-Force

-New Secret Packs:
The following Secret Packs will be unlocked until June 7th (time zones applying). Until that period, you can also obtain 1 free pack from each of them.

Furthermore, the following cards have been added to the Secret Pack Piercing Winds:
Laughing Puffin (R)
Simorgh, Bird of Perfection (R)