In World of Warcraft: Battle for Azeroth, the need for corruption resistance is all-encompassing. Some of the strongest abilities in the game are granted by gear-based corruptions, which comes at a bit of a trade off. \n \nThe stronger the corruption, the more corruption it gives you, which quickly stacks up into punishing negative effects. These effects range from slowing you on occasion to chasing you down with a shadow of your character that deals heavy damage and stuns, often spelling death. \n \nTo wear the stronger corruptions without negative consequences, players need to stack corruption resistance, which is primarily obtained through their legendary cloak Ashjra'kamas, Shroud of Resolve. \n \nUnfortunately, it isn't as easy as just getting the cape: Much of the endgame of World of Warcraft: Battle for Azeroth is based around upgrading the cape up to a maximum of rank 15, at which it grants 50 corruption resistance. \n \nHowever, 50 corruption resistance turns out to not be much. In fact, there are some corruptions, such as the third rank of Infinite Stars, which will give 75 corruption, shooting right past the resistance of the cape and sticking you with negative effects. \n \nhttps:\/\/twitter.com\/Wowhead\/status\/1275993332460785664?s=20 \n \nIn order to continue growing your resistance, players must obtain Malefic Cores from a variety of sources. Each core obtained gives the cloak another 3 corruption resistance, eventually capping off at 92 (currently). \n \nUnfortunately, only a few can be obtained a week, and players that just recently got their cloak to 15 were in a position where it was virtually impossible to catch up to the point of reaching the cape's corruption cap. \n \nTo help remedy this issue, Blizzard has made Malefic Cores purchasable from MOTHER in another expansion of the Echoes of Ny'alotha system. Primarily used to purchase corruptions and third-rank essences, players can now use Echoes to purchase Malefic Cores. \n \nThere are still limits in place here, of course - 2000 is a hefty price for Echoes of Ny'alotha, which are difficult to farm. Additionally, they can only be used on a 15 cloak, so if you're not at max rank yet, you'll still need to grind those out. \n \nOnce there, players would need to purchase a huge number of Cores to get from the rank 15 cloak to the cap of 93 - about 14 of them, depending on if players get them from other sources as well. This would cost 28,000 Echoes, which is certainly doable, but an extremely lengthy farm to manage. \n \nEither way, it's a fantastic option to have. As Blizzard continues to expand on their Echoes of Ny'alotha currency system, more and more utility seems to be constantly added.