Not only that, Covered Card Skills are most friendly to Wisdom Cards and Birth Cards.
Ree Shil didn't have any Birth cards, but he did have a Covered Card Skill, which was the passive of the Breaking Balance Sword.
Balance Sealing Technique - Passive: When the Breaking Balance Sword releases a skill on a Balanced Card, it re-covers the card and "Locks" it.
Unfortunately, this skill could not cover Wisdom Cards.
Covered Card Skills were rare, and he had always wanted to obtain another but had no chance until today.
To be precise, it wasn't that covering was friendly to wisdom and birth.
It was the re-revealing after covering that could help them re-charge.
Especially, Wisdom Cards under the aid of covering skills were simply shameless.
In broad terms, Wisdom Cards are full charged upon being revealed.
So all that was needed was to cover them and then uncover them to obtain fully charged energy, with the only cost being one chance to reveal.
