How to calculate the life value of senior figures in DND?

The mage's life roll is 1D4.

1 level, when the life roll is full, it is 4+ physique adjustment value.

At level 2, take half the life roll, which is 2+ physical adjustment value.

Give a data example to help you understand better.

Suppose the system of mage A is 12. According to the table in the player's manual, when the attribute is 12, the adjustment value is+1.

Then the HP of Master A is 5 at 1, 8 at level 2, and 1 1 at level 3.

In addition, every time you choose a strong specialty, you will get 3HP at this level.