Chain System

Guys, can you explain the chain system? Does "stack" mean the chain that resets every round? I'm asking because I want to pull for Liberta, and his skill requires at least 10 chains to activate the buff, right? If that's the case, wouldn't it be difficult to get 10 chains every round (if the chain resets each round), especially since each character's skills have their own cooldowns? Please explain this to me 😭

Guys, can you explain the chain system? Does "stack" mean the chain that resets every round? I'm asking because I want to pull for Liberta, and his skill requires at least 10 chains to activate the buff, right? If that's the case, wouldn't it be difficult to get 10 chains every round (if the chain resets each round), especially since each character's skills have their own cooldowns? Please explain this to me 😭