Now that you know how to play, here's how to progress into the Xenverse!
Flooring: For starters, it's nice to get yourself at least a Diamond rank wrecker card (but any high leveled card will do, for now), as it can sweep up to location/zone 30 at most. Then when you earn enough gold for either a Guardian or a Revitalize of Immortal rank, then go buy one, as they could do the job better in the higher zones with Youmu's Ghostblade or Bloodthirster equipped.
Below are examples of common floor roadblocks you might encounter (These are set to their highest possible rarity for their respective zones):
1. Kumin Tsuyuri (Floor 40-16)
Talent: Sleep (Diamond Rank): Inflict a stack of Drowsiness on the enemy causing them to miss their turns until they are awake.
Counters: Dark Element Berserk card. Other options is Guardian which isn't a Grass or Wind element.
Item: Youmuu's Ghostblade
Sleep triggers every 3 rounds, which means Revitalize isn't a viable option. It would be better to gain buffs from berserk and hope that it can get some good damage off before your card has been put to sleep, or outheal her with Guardian until the end of battle, which is 15 rounds, but you only get 1 free heal, which is at round 2. Every other heal can only happen if your card manages to break free from drowsiness.
Berserk counter can only be used against sleep cards that have an elemental weakness. If the said sleep floor is a Neutral or Light Element. better bring a Guardian card with you.
2. Sakurajima Mai (Floor 62-25)
Talent: Guardian (Legend Rank): Restore 23% - 25% HP based on your DEF and also increase the DEF of all allies for the same %.
Counters: Any good stat Revitalize card
Item: Youmuu's Ghostblade
This is where Guardian cannot outheal a Guardian floor, as these floor bosses have way more health than your Immortal Guardian cards. Revitalize would be better because they can boost their ATK to eliminate all the heals and counteract the floor's DEF increase. Better pray that your item give you a lot of evades for that to work.
3. Rize Tedeza (Floor 84-25)
Talent: Point Blank (Divine Rank): Increase the Accuracy of all allies by 23% as well as increasing CRIT Chance by 33%
Counters: Dark Element Berserk (special mentions: Rikka Takanashi <Dark/Electrocute>, Mio Akiyama <Dark/Revitalize/Event> and Uruha Rushia <Dark/Sleep/Event>
High Accuracy floors tend to break your cards in 2 to 3 hits. This is where elemental advantages take the spotlight. Mitigating the damage taken from the the early and late critical hits can hopefully give you enough health to beat them, although you might have to try a few times as well due to how much they land crits.