Upgrade

Users can only upgrade:

1. S-Rank Monster Card

2. Shadow Army Cards (B and A-Rank Only)

When a user attempts to upgrade an S-Rank monster card

Shadow Army Cards Rank [B-Rank < A-Rank < S-Rank]:

S-Rank Monster Cards can be upgraded to B-Rank Shadow Army Cards.

For higher ranks, users can use Essence Stones to upgrade:

• B-Rank Shadow Army Card for a chance to obtain A-Rank Shadow Army Card.

• A-Rank Shadow Army Card for a chance to obtain S-Rank Shadow Army Card.

Upgrade Requirements by Shadow Army Rank

Collectible Type	On Successful Upgrade	On Failed Upgrade
Cards	Burned	Retained
Essence Stones	Burned	Burned