Reference
Common Cards can be upgraded to level 13.

Graveyard

Graveyard
Surprise! It's a party. A Skeleton party, anywhere in the Arena. Yay!
Rarity Rarity Legendary

Upgrade

  • Upgrade
Level Level
Cards Cards
Experience Experience
Gold Gold
1
2
250
5000
2
4
600
20000
3
10
800
50000
4
20
1600
100000
5
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