When you win an event battle or daily battle, you will receive 3 to 6 treasure chests as a reward. From inside the treasure chest, you can get the zenny and the spirit of cards.
The spirit that can be obtained is random, but the eye drop reward is set for event battles and daily battles, and the spirit of the eye drop card has a slightly high drop rate, so if the target card is in the eye drop reward, be active I want to challenge the battle and get the reward for victory.
UR is also available with a victory reward drop!
I couldn't prepare the UR image, but from the victory reward treasure chest, the spirit of N Normal, R Rare, SR Super Rare, and UR Ultra Rare cards dropped. The number of spirits is also random, and you can check up to 3 to 120 pieces.
In Butchgiri Match, you can acquire and enhance that card by collecting a certain number of card spirits, so you want to participate in battles and get victory rewards.