This set is sold by the following vendors for 9,900 Honor Points:
Neutral: Ecton Brasstumbler in Gadgetzan.
Neutral: Zom Bocom in Dalaran.
Horde: Blood Guard Zar'shi in Orgrimmar
Alliance: Knight-Lieutenant T'Maire Sydes in Stormwind City.
The legs and hands armor also drops from Occu'thar in Baradin Hold.
Ruthless Gladiator's Desecration is the Arena Season 10 Death knight set. It contains 5 pieces. Has set bonuses at 2 and 4 pieces.
Ruthless Gladiator's Dreadplate Chestpiece
Ruthless Gladiator's Dreadplate Gauntlets
Ruthless Gladiator's Dreadplate Helm
Ruthless Gladiator's Dreadplate Legguards
Ruthless Gladiator's Dreadplate Shoulders
Wearing more pieces of this set will convey bonuses to your character:
2 pieces: Increases Strength by 5.
4 pieces: Whenever you are struck by a movement-impairing effect, you will generate 3 Runic Power every 1 sec for 5 sec.
4 pieces: Increases Strength by 6.
Here you can buy Season 10 Death knight Ruthless Gladiator's Desecration for EU or US Servers.
You'll get guide for getting Season 10 Death knight Ruthless Gladiator's Desecration