You can play Conquest mode using Conquest tickets, or by burning Silver Cards. Once in Conquest, you play until you lose or until you win three (3) matches. Based on how many wins you achieve during a Conquest, you get the following rewards:
0 win: Conquest points + XP
1 win: 1 Silver card + Conquest points + XP
2 wins: 2 Silver cards + Conquest points + XP
3 wins: 1 Gold card + 1 Silver card + Conquest points + XP
***Conquest points can be earned beginning with Patch 100.
Conquest points are used to redeem Conquest Treasures, which contain a certain amount of USDC. You can find out more about the Conquest Treasure here.
Once you lose a match, your run will end and you will need to use another Conquest ticket to re-enter and start over.