Death Weapon Revamp

[x1341x]

Question :

DEATH STAFF
[OLD]
INT +5, MATK +20%
Class: Rod
Attack: 40
Weight: 40
Weapon Level: 2
Applicable Job: Mage Class, Acolyte Class, Soul Linker

[NEW]
INT + 25
DEX + 25
MATK +20%
MATK + 15+(DeathMastery/500)% - (25% Max MATK)
Magical damage to All Races by (DeathMastery/250)% - (20% Max)
Gain 1% HP for every refine level (10% Max)
Class: Rod
Attack: 40
Weight: 40
Weapon Level: 2
Applicable Job: Mage Class, Acolyte Class, Soul Linker

specially this part :
MATK + 15+(DeathMastery/500)% - (25% Max MATK)
Magical damage to All Races by (DeathMastery/250)% - (20% Max)

assume as mention above, from this part

All weapon can be enchanted with 1 Weapon Enchant after reaching Death Mastery of 5,000 (It costs 10 BraveRO Tokens through NPC at Death Match Shop)

MATK + 15+ (5000/500)% - 25% max matk >>> MATK + 15 + 10% - 25% >>>> 0% ?
Magical damage to all race by (5000/250)% - 20% max >>>> 20%-20% max >>>0% ?

or theres no cap on deathmaster?

or would you mind to give an example for the death master calculation. cos my brain stupid.
Thank you