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72-hour-challenge-icon
72-Hour Challenges, also called Card Flipping Events, were events that last for, as the name suggests, 72 hours. While shorter versions have occurred, the mechanics are the same.

Challenge Coins

Players earn 72-hour-challenge-coin by completing various tasks. Unlike other events, there is no cap on the amount players can receive with each task. With the latest occurrences of the Challenge, challenge coins are earned from a special roulette when players win a Multiplayer battle. All possible results are the same. The amount of challenge coins earned depends on the player's current league:

League 72-hour-challenge-coin
Gr-league-icon-monster-legend v1 Legendary Leader 800
Gr-league-icon-legendary1 v1 Legendary I 600
Gr-league-icon-legendary2 v1 Legendary II 520
Gr-league-icon-legendary3 v1 Legendary III 510
Gr-league-icon-legendary4 v1 Legendary IV 500
Gr-league-icon-champion1 v1 Champion I 420
Gr-league-icon-champion2 v1 Champion II 410
Gr-league-icon-champion3 v1 Champion III 400
Gr-league-icon-gold1 v1 Gold I 320
Gr-league-icon-gold2 v1 Gold II 310
Gr-league-icon-gold3 v1 Gold III 300
Gr-league-icon-silver1 v1 Silver I 220
Gr-league-icon-silver2 v1 Silver II 210
Gr-league-icon-silver3 v1 Silver III 200
Gr-league-icon-bronze1 v1 Bronze I 100
Gr-league-icon-bronze2 v1 Bronze II 75
Gr-league-icon-bronze3 v1 Bronze III 50
Gr-league-icon-beginner v1 Beginner 25

Card Flipping

Players spend challenge coins by flipping cards. Players earn rewards with each card flip and, eventually, earn the monster. The cost for each card flip increases each time. Players may also spend Icono gema to immediately claim the monster. The gem cost reduces with each card flipped.

Despite the appearance that the cards are shuffled, the result of selecting a card is actually predetermined before the card is selected, meaning the card that is selected is irrelevant to the result. It is important to note that the chances of each reward are not necessarily equal. While it is possible to obtain the monster on the first flip, it is far less likely than other rewards. Even when only two cards remain, the chances are not necessarily 50/50.

Most 72-Hour Challenges have 3 monsters that players may attempt to get, listed in order from least to most expensive. After flipping all the cards and collecting all the rewards for each monster, players may (depending on the Challenge) be able to play again.

The following table displays the challenge coin cost for each flip as well as the corresponding gem cost for immediately claiming the prize monster:

First Monster
72-hour-challenge-coin Icono gema
70 1,700
85 1,680
100 1,650
120 1,600
140 1,520
165 1,395
200 1,220
235 1,005
280 790
335 595
400 450
475 350
565 290
675 250
800 230
955 220
1,135 210
1,350 180
8,085
Second Monster
72-hour-challenge-coin Icono gema
120 2,305
140 2,285
165 2,255
200 2,200
245 2,105
290 1,955
345 1,735
410 1,455
495 1,145
595 865
710 645
845 495
1,015 400
1,215 345
1,460 315
1,750 295
2,090 250
2,650 225
14,740
Third Monster
72-hour-challenge-coin Icono gema
200 2,305
240 2,285
285 2,255
340 2,200
405 2,105
480 1,955
575 1,735
685 1,455
820 1,145
975 865
1,165 645
1,390 495
1,655 450
1,975 400
2,355 375
2,810 350
3,355 345
4,000 300
23,715
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