In Celestial Bane 2, if a skill's Heavenly Book was already full and the talisman of the skill was added, it would have the following effects: 1. Increase the damage output of skills: Talismans can increase the damage output of skills so that skills can defeat enemies more effectively. 2. Increase the effect of the skill: The amulet can add additional effects to the skill, such as increasing the skill's attack power, reducing the enemy's defense, etc., so that the skill can better deal with various situations. 3. Increases the accuracy of skills: The talisman can increase the accuracy of skills, making the skills more accurate when attacking the enemy and increasing the player's attack power. 4. Increase Skill Duration: Talismans can increase the duration of a skill, allowing the skill to continuously deal damage to the enemy and increase the player's survivability. 5. Increase skill effect resistance: The amulet can reduce the effect of the enemy's skills, such as reducing the attack power of the skill, increasing the defense of the enemy, etc., so that the enemy can not effectively use the skill to attack the player. In short, the talisman of the Heavenly Book skill could increase the effect of the player's skill, increase the output ability and survivability of the skill, and was one of the commonly used equipment in the game.