Era of Celestials Soul Cards Upgrade Guide

To upgrade Soul Cards in Era of Celestials, equip your highest-rarity cards into active deck slots and consume surplus low-tier cards or dedicated experience items to raise their level. Card experience should be distributed across your active slots rather than dumped entirely into a single card, giving upgrade priority to cards that provide offensive attributes and activate set synergies.

How to Upgrade Equipped Soul Cards

Upgrading a card raises its level, which increases its base and secondary attributes along with your total Battle Rating (BR). Progression spans green, blue, purple, orange, and red rarity tiers, with higher tiers offering higher base statistics and higher enhancement level caps.

Follow these steps to upgrade an active card:

Open the Soul Card interface and select an equipped card from your active deck rather than your storage inventory.
Select your upgrade materials by choosing low-tier duplicate cards (such as green or blue tier) or dedicated card experience items.
Confirm the enhancement to fill the experience gauge and reach the next level milestone.
Check the updated stat values, then move to your next active slot to prevent over-investing in a single card.

Avoid sinking excessive experience into a low-rarity card if you possess or expect to acquire an orange or red alternative in that slot. Upgrading multiple active cards in parallel ensures steady stat scaling across both offensive and defensive attributes.

Card Stat Priorities

While defensive attributes provide visible Battle Rating increases, offensive stats directly affect clear times in timed PvE encounters and damage output in cross-server PvP.

Attribute Focus	Priority	Recommended Use	Combat Benefit
Attack and Penetration	High	All damage builds	Bypasses enemy defense and speeds up boss clears
Critical Hit and Crit Damage	High	Burst classes (such as Demon Hunter)	Amplifies burst damage against high-health targets
Max HP and Defense	Medium	General survival and tanks	Reduces incoming damage in high-tier dungeons
Resistance and Damage Reduction	Situational	PvP Arena	Decreases incoming burst damage combinations

When facing timed enrage timers or boss challenges, invest your experience into cards granting flat Attack and Penetration before enhancing survival cards.

Managing Materials and Experience Retention

Cards in the green and blue tiers offer minimal long-term value and should be used primarily as enhancement fuel. Before consuming any duplicate card of purple rarity or higher, confirm that it is not required for an alternate deck configuration or set bonus.

The upgrade system features experience retention when replacing gear:

If you replace an upgraded card with a higher-tier card (such as swapping purple for orange or red), the older card can be consumed as material.
Consuming an upgraded card transfers a significant portion of its accumulated experience into the new card.
This allows you to upgrade temporary purple or orange cards to maintain progression without forfeiting all invested resources later.

Activating Set Synergies

High-tier Soul Cards can form thematic sets that grant composite attribute bonuses beyond their individual stats. Equipping matching pairs or four-piece configurations activates set milestones that deliver percentage-based boosts to overall damage output or survivability.

When choosing which card to enhance next, verify whether it belongs to an active or near-complete set. Upgrading cards that fulfill an active synergy yields greater aggregate stat value than leveling unlinked, standalone cards. Review your deck after obtaining new drops from dungeons, events, or shops to keep active sets aligned with your build.