Darkest Night

Earn Dark Energy and Dark Cups by completing tasks, you can also get dark energy and dark cups by opening duels boxes, dark energy are used to open chests and dark cups are used at the Darkest Tournament, the more dark cups you got the higher you are in tournament. the 1st to 50th place get Infernal Energy as reward, infernal energy are used to open Infernal coffer. At the end of the tournament the dark cups quantity is reseted.

Chests
Cursed Coffer - 3 pickings, unique common event card is guaranteed, can be obtained with 100 dark energy. Also contains duplicates for Common-Legendary non-event cards that are already owned.

Darkest Coffer - 5 pickings, unique rare event card is guaranteed, can be obtained with 500 dark energy. Also contains duplicates for Common-Legendary non-event cards that are already owned.

Infernal Coffer - 10 pickings, unigue rare and common event cards are guaranteed, unique legendary event card is possible, can be obtained with 2 infernal energy. Also contains duplicates for Common-Legendary non-event cards that are already owned.

Energy
The event features two types of Energy. Dark energy and infernal energy.

Along with Energy you get Dark Cups for Dark Tournament rating of the same amount as dark energy.

Tasks
you can get dark energy and dark cup by completing task, the tasks won't reset at the end of the tournament, here is a list of tasks.

10 - Level up a dark card

20 - Seduce 3 times any card (can be three different cards)

30 - Win 5 duels

40 - Win City 16.2

50 - Open 4 boxes

60 - Level up dark cards 5 times (can be different cards)

70 - Win Forest 5

80 -  Wind Duels 10

90 - Win Forest 9.2

100 - Get 30 rare dupes

110 - Open 5 chests in duels

120 - Win Forest 10.2

130 - Get 50 common dupes

140 - Open Cursed Coffer

150 - Reach Master League 1

160 - Get 10 Epic Card Duplicates

170 - Level up 10 epic Cards

180 - Win Forest 14.3

190 - Open 8 chests in duels

200 - Open Darkest Coffer

210 - Get two legendary Cards ? (Meaning duplicates?)

220 - Reach Master League 2

230 - Get one Epic dark card (Element Type dark) -  Can be dupe (can be non-event

dark card, like Dark Pristress?)

240 - Get 10 rare Card Dupes

250 - Seduce cards 5x

260 - Spend 3400 Dark Energy

270 - Reach Master League 3

280 - Level 10 epic cards

290 - Win Sands 4.5

300 -  Reach Champion League 1

310 - Have 3-star Outworld Devourer or Moiru card

320 - Have 4-star Epic card

330 - Win Sands 9.2

340 - Reach Champion League 2 in Duels

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Missing

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500 - Finish Sands 16 Battle