Choose the right upgrade route
| Action | Use it for | Check first |
|---|---|---|
| Level Up | Selected card with enough spare copies | Card name, border, current level and spare count. |
| Level Up All | Multiple cards eligible from spare copies | The UI indicates how many cards can level. |
| Tomes | An important card below level 21 | Each Tome is one level, capped at 21. |
| Account stat points | A separate account system | Open the star/LV panel, not the card panel. |
The early Army recording shows 47 cards leveled up, +598 levels after Level Up All. That is the player’s available inventory at that moment, not a fixed reward for pressing the button.
Level and power observations
A selected level-1 card displays +0%; a level-46 sample displays +135%; level 51 MAX displays +150%. Those observations are consistent with three percentage points per level above 1. They do not tell us the number of duplicate copies needed at every step or justify normalizing every trait/border stat into a “base DPS” number.
Use Tomes for the documented early range. If the panel says duplicates are required, more Tomes will not bypass it. Do not confuse a higher account XP level with a stronger individual card.
Upgrade the card that changes a fight
Watch the defeat first. Keeping a front card alive until an every-third-turn ability can matter more than distributing a small increase to a card that never acts. Conversely, a stable but slow team can need damage rather than more defense. Combat and team planning help identify that difference.
Use the Tome calculator to compute a supported target and inventory shortfall. It deliberately does not guess a full duplicate-cost table.