Most SR cards are not worth using souls on (unless we're talking about Ethan cards Instant Counter and Holy Sword's Blessing), so don't level them up.
If there is any outdated information, feel free DM me on discord (sefhi) and I'll fix it.
Melee Attack Increase: 24%
Health Recovery: 110
Target: Self
Effect: Activate when current HP is at 50 HP or less
Damage Reduction: 0.5%
Healing Increase: 6%
Defense Increase: 6%
Target: All Allies
Effect: At the start of each round, Recover a percentage of your team’s health
Health Recovery: 11%
Magic Attack Increase: 24%
Target: Enemy
Effect: Enemy Attack Reduction
Reduction: 1.5%
Status Effect Accuracy Increase: 16%
Target: Enemy
Effect: Decrease Critical Resistance of Enemies
Reduction: 1.5%
Additional Damage: 6%
Critical Damage Increase: 55%
Target: Self
Effect: Alter remaining cooldown of the active skill to 0s
Melee Attack Increase: 24%
Defense Increase: 6%
Target: Self
Effect: When hit, gain a buff that increases Attack per stack (10 Max Stack)
Attack Increase Per Stack: 1%
Magic Attack Increase: 24%
Target: Self
Effect: When Current Health is at a certain percentage, Increase Magic Crit Rate
Health Thresholds: 100%
Magic Crit Rate Increase: 1.5%
Range Attack Increase: 24%
Target: Self
Effect: When Current HP is 50 or more, increase Melee and Ranged Defense
Melee Defense Increase: 18%
Ranged Defense Increase: 18%
Magic Attack Increase: 24%
Status Effect Resistance Increase: 1%
Target: All Allies
Effect: Critical Resistance Increase for your entire team
Critical Resistance Increase: 1.5%
Attack Increase: 24%
Target: Self
Effect: Attack Speed Increased for 10 seconds
Attack Speed Increase: 10%
Magic Attack Increase: 24%
Ignore Damage Reduction: 1%
Target: All Allies
Effect: Increase your team’s Attack for 10 seconds
Attack Increase: 10%
Defense Increase: 24%
Damage Reduction: 1%
Target: Self
Effect: Remove 1 Debuff in effect
HP Increase: 18.4%
Target: Self
Effect: At the Brink of Death. Become Immune to damage for 3 seconds
Target: Self
Effect: At the brink of Death. Prevents death when receiving fatal damage
Magic Attack Increase: 24%
Ignore Damage Reduction: 1%
Target: Self
Effect: When Current Health is at a certain percentage or more, Increase Magic Attack
Health Thresholds: 100%
Magic Attack Increase: 15%
Magic Attack Increase: 18.4%
Target: All Allies
Effect: Healing received increase
Health Recovery: 1.5%
Melee Attack Increase: 18.4%
Target: Self
Effect: DMG Reflect: Upon getting hit by the target, deal 1 addition hit equal to 50% of the damage
Defense Increase: 24%
Healing Receive Increase: 6%
Target: Self
Effect: Generates a shield at the start of the game that absorbs a percentage based on Caster’s HP
Shield Absorption: 20%
Magic Attack Increase: 24%
HP Increase: 6%
Effect: Transfers a percentage of damage taken to one of the allies with Highest HP excluding yourself
Damage Transfer: 2.5%
Magic Attack Increase: 24%
Magic Critical Strike Chance Increase: 1%
Target: All Allies
Effect: Increases entire team’s critical damage
Critical Damage Increase: 9%
Attack Speed Increase: 2%
Additional Damage: 1%
Target: All Allies
Effect: Increase’s entire team’s Additional Damage
Additional Damage Increase: 0.5%
Melee Attack Increase: 24%
Target: Self
Effect: When current HP is 50 or more, Status Effect Resistance Increased
Status Effect Resistance Increase: 2.5%
Melee Attack Increase: 24%
Melee Critical Chance Increase: 1%
Effect: When hit, deal bonus damage equal to a percentage of Attack Power
Bonus Damage: 10%
Magic Attack Increase: 24%
Damage Reduction: 1%
Target: Self
Effect: When hit, Increases the target unit's defense per stack (up to a maximum of 12 stacks)
Defense Increase Per Stack: 1%
Melee Attack Damage Increase: 24%
Melee Critical Strike Chance Increase: 1%
Target: All Allies
Effect: Increase the team’s ATK
Team ATK Increase: 9%
HP Increase: 24%
Magic Attack Increase: 6%
Target: All Allies
Effect: Apply team buff
Attack Increase: 2%
Defense Increase: 2%
HP Increase: 24%
Target: All Allies
Effect: Increase the entire team’s Defense
Team Defense Increase: 9%
Magic Attack Increase: 24%
Attack Speed Increase: 1%
Target: All Allies
Effect: Increases your entire team’s critical hit chance
Critical Hit Chance Increase: 0.5%
Ranged Attack Damage Increase: 24%
Ranged Critical Strike Chance Increase: 1.0%
Target: Self
Effect: Increase target by 1~3, Healing Reduction by 35
Melee Attack Increase: 24%
Ignore Damage Reduction: 1%
Target: Self
Effect: When current health is above a certain percentage, Melee critical strike chance increased
Health Thresholds: 100%
Melee Critical Strike Chance Increase: 1.5%
Melee Attack Increase: 24%
Target: Self
Effect: On kills, gain a stack that increases your Attack (Max 20 stacks)
Attack Increase Per Stack: 0.5%
Melee Attack Increase: 24%
Target: Self
Effect: When the current HP is at 50% or less
Attack Increase: 5%
Attack Speed Increase: 3%
Ignore Damage Reduction: 2%
Ranged Attack Increase: 24%
Ignore Damage Reduction: 1%
Target: Self
Effect: When HP is above a certain percentage, Increases ranged critical strike chance
Health Thresholds: 100%
Ranged Critical Strike Chance Increase: 1.5%
Magic Attack Increase: 24%
Magic Critical Strike Chance Increase: 1%
Target: All Allies
Effect: Increases your entire team’s attack
Team Attack Increase: 9%