Riot Games introduced a new economy trait into Teamfight Tactics Set 8: Monster Attack! The trait is called "Underground". The trait provides players with item components or even full items.
The Lagoon trait is being replaced with the Underground trait in Teamfight Tactics Set 8. Champions with the trait attempt to accomplish a heist by breaking locks during each round of player combat, receiving prizes for completing up to seven heists in total. League of Legends champions: Kayle, Ezreal, Vi, Sona, and Samira are the Underground-trained troops in Set 8 .
A losing streak gives players more progress rather than winning a game. However, players on a winning run might still benefit from the Underground features. This activates at three Underground champions. Upgrading to five champions gives you a higher chance for better prizes.
Three Underground units break two locks cracked after each player's combat round and three locks with a loss. Five Underground units break three locks cracked after each player combat round and five locks after a loss.
A heist is completed by cracking ten locks, which was upgraded from nine to ten on the last PBE release. There are a total of seven heists from which players can earn prizes.
Early Heist vaults may include insignificant prizes like as money, components, or an item. Players can accept the bounty or continue opening vaults, earning bigger rewards with each robbery committed.
It's not simple to get to the seventh heist. According to game design director Stephen "Mortdog" Mortimer, prizes for cracking the seventh vault include Radiant items, Ornn Artifacts, and other surprises.
The third vault is when the benefits start to become better. This is when you have the highest chance to get the best items. The third vault can give you the Tactician's Crown, which allows you to place one more unit into your board.