In this experiment an influence of Doom Set (Heavy armor), Doom Shield and Blessed Shield (6 Lv.) buff on Shield Defense Rate has been estimated. Attacker: Human – Warrior, 52 lvl, without any buffs. Equipment: Long Sword Target: Human – Warrior, 52 lvl, without any buffs. Equipment depends on the test. During this experiment, an attacker made 1.000 strokes for each test: Target doesn’t have any buffs. Equipment: Doom Shield Target doesn’t have any buffs. Equipment: Doom Set (Heavy armor) and Doom Shield Buff: Blessed Shield – 6 ; Equipment: Doom Set (Heavy armor) and Doom Shield. The results are stated below: Test Rate Test 1 33,4% Test 2 45,2% Test 3 55,2% Summary: as it can be seen from the test, Doom Set increased Shield Defense Rate by more than 10% as it provides a set + shield bonus and enhances CON value. The 10% rate difference between second and third tests is explained by Blessed Shield effect.