Deck upgrade calculator

Pick cards or just set a rarity per slot — the cost depends only on rarity and levels, so you don’t need specific cards. Set current and target levels and we’ll count the copies and gold, plus the gems it takes to buy any copies you’re short of. Levels of player #JLL89U2PL.

Total to target

1.6M
Gold
24.6K
Copies
29.4K
Gems
Common
23,504
Rare
589
Epic
458
Legendary
48

Every level costs copies + gold. If you don’t have enough copies, the missing ones can be bought with gems — so an upgrade is either copies + gold, or gems (for the missing copies) + gold. Gem prices follow the official table (December 2025), proportional to the shortage; gold itself is not converted to gems.

  • Furnace1
    589 copies355K gold1.3K gems
    Now
    10
    Target
    16
  • Barbarian Barrel2
    161 copies120K gold3.5K gems
    Now
    15
    Target
    16
  • Tesla3
    9.6K copies335K gold3.5K gems
    Now
    11
    Target
    16
  • Ice Spirit4
    0 copies0 gold0 gems
    Now
    16
    Target
    16
  • Poison5
    297 copies210K gold6.2K gems
    Now
    14
    Target
    16
  • Graveyard6
    48 copies355K gold10K gems
    Now
    10
    Target
    16
  • Skeletons7
    13.9K copies270K gold5K gems
    Now
    13
    Target
    16
  • Knight8
    0 copies0 gold0 gems
    Now
    16
    Target
    16