Tetra Master card HP?

[Vaker]

Is there a way to know the HealthPoints of our card ? Is it random?

[DSpecht]

There isn't really a HP stat for a card. To keep things simple: when battling, a card's attack stat (first, digit, 0-9a-f, f being highest) is weighed against one of the two defense stats (the last two digits, also 0-9a-f each). Usually the higher stat wins the batte, however, it is decided solely by randomness. A higher difference in attack and defense raises the chances of a successful attack/defense, still, an f can lose to a 0 stat, even if it is very unlikely.
This process is repeated for every card battle, so there isn't a way to wear down a card with repeated attacks.

The attack stat is fixed, the chosen defense stat is dependend on the offensive card's attack type (second digit, either p/m/x/a)
p: physical, battles the first defense stat (third digit)
m: magical, battles the second defense stat (last digit)
x: battles the weaker of the two defense stats
a: battles the weakest stat overall, including attack stat

Winning any card battle gives the winning card a small chance to upgrade their attack type to x and afterwards to a.

[Vaker]

Wow ! Thank you