Obtaining more skills through skill shard battles in DBZ: Battle of Gods VS/ Saiyan Legends app is a way to increase your rare skills level and power, or find useful skills to enhance your heroes.
Skills Shard Hunts
Whilst travelling through the Journey battles, you are likely to encounter a skill shard item as a reward. Once the required amount of shards for a skill have been found, players can combine them to create a Skill.
The other way to obtain skill shards is through Skill Shard Hunts, found in the Shard menu. Skill Shard Hunts are essentially stealing a skill shard from another player to add to your inventory.
If you win a Skill Shard Hunt, you have a chance to steal that skill shard from your opponent. A higher level opponent will give you a greater chance to steal the shard. Each hunt cost 1 stamina, which can be replenished with the "healing potion" item.