Character's card[]
When you sign up, you'll receive your first 8 Characters free of charge. At each level, a character is defined by its Power (P) and Damage (D). Some characters also get a special ability when they reach a certain level.
All of this information is indicated on the character's card.
(1) Character's name - Self explained.
(2) Character's level/star count - Self explained
(3) Illustration - The card's art.
(4) Power - Power is also known as attack. If you have, in this case, 2 power, then for every pill you use, it will add 2 attack.
(5) Damage - Damage is how many life points you will take away from the opponent.
(6) Ability - Abilities can be anything from helping your card win the round to applying Poison or reducing the enemy's Damage.
(7) Clan Bonus - If you have 2 cards of the same clan in your hand, their Clan's Bonus will be activated.
(8) Clan Logo - The picture of the Clan the character is in.
Card XP[]
Cards get XP which is then used automatically to level up cards to their final level. The ammount of XP needed per level is shown below.
Level 1 - 2: 500xp
Level 2 - 3: 1500xp
Level 3 - 4: 3000xp
Level 4 - 5: 5000xp
A player gains XP when they level up their cards, hence why cards that aren't fully upgraded sell for more Clintz on the Market.