Erthenia

Okay.
W – saving throw is magic resistance
E – saving throw is evasion of targeted spells

All damage reduction does not add up, but is applied sequentially. For example, a character has heavy armor for -50% damage, an ice armor, and an experience with endurance ability of 20. He receives 1000 units of physical damage: -40% (ice armor is applied before regular armor) = 600 - 50% = 300 - 20% (experience is applied last, as it is essentially a reduction of the final damage) = 240.

QUESTIONABLE POINT: Can fire spells counter cold spells, and can water spells counter fire spells (unfreeze/extinguish) – I haven't decided on this yet. It seems logical to some extent, but if such things are allowed, then other similar situations may arise.

Runes. To use runic magic, the following is required:
1. The presence of a forge nearby, ready for use.
2. The character must have runic stones.
3. 50 units of magical energy for one use.

To use seal magic, the character must also have specially prepared paper talismans.
This type of magic came from Tao and spread widely in Illianar, and later in other countries.

Warriors also have regular attacks

There is indeed a meaning to this. Because in the case of a warrior, beheading is an ultimate action, in addition to which there are other ways to kill.