Right Back at You Can be used in the Main Phase of your next turn following the turn in which you took battle damage. Select 1 face-up monster on your field. This turn, the selected monster's ATK increases by half of the battle damage received in the turn you last took battle damage. This skill can only be used once per turn.
Shadow Game At the end of their respective turn, each player will lose LP equal to "100" times the number of cards in their own graveyard.
Power of the Tributed When you sucessfully Tributed Summon "The Winged of Ra", its ATK will becomes the sum of the ATK of the Tirbuted Monsters, and its DEF will becomes the sum of the Tributed Monsters.
There has been no official announcement about how to unlock Yami Marik, but, at Jump Festa 2017 that was held on December 16th-17th in Tokyo, JAPAN, visitors can play a duel against Yami Marik, Pegasus, and Yami Bakura visiting the Duel Links booth.
Yami Marik is Marik Ishtar's dark side created from the suffering he endures as a Grevekeeper. Cruel and vicious, he enjoys watching his opponents suffer. His appetite for destruction is incomprehensible. His "Lava Golem" can be summoned to the opponent's side of the field where it slowly puts the stranglehold on his foe.
Even though I already have him, it would be nice to always be able to duel him at the gate and in duel world. But for some reason, Konami has decided to be real jerks about this and go so far as to add characters (Mokuba, Yugi, Bonz) to the gate who have had their first unlock events after Yami Marik's first one back in July.
It's really Arkana that needs it more to be honest. Marik's had a billion events giving out his cards. Arkana had one proper appearance, and a once-a-day low-level one for one of Marik's events. I'm surprised we got Bonz and Mokuba before him to be honest, since his Anti-Magic Arrows is a somewhat important card like Yugi's Union Attack.
The old Arkana event right before Yami Marik's first unlock event was how I got two Anti-Magic Arrows. I think my other one was from Set Sail to the Kingdom. But since they were so hard to get from the lottery and Arkana's temporary gate appearance during the Yami Marik Ra event (and some people might not have time to get the tickets), then moving him to the gate faster does make sense.