I really like hazard stack especially paired with hard hitters, so that's the basic idea I had behind the team. Hippowdon and Skarmory provide hazards and form part of the team's defensive backbone. Next up, I didn't want Defog as that's counterproductive with this build, so I opted for Excadrill to remove hazards. With the sand support, Driller gives me a means of taking down frail, offensive builds and it appreciates the hazards set by Hippo and Skarm. Mega Latias serves as the the team's water-resist, Zard Y check, and challenger of opposing Calm Mind users, being able to beat the majority of them with Stored Power. Tornadus-T is the other part of the defensive backbone and was added to check threats such as Gengar and Mega Alakazam without forfeiting momentum. Finally Spexdeo was added to break down walls and check the threatening Dark-types (M-Gyara, Bisharp, Weavile). Keldeo also weakens checks to sand (Venu, Rotom, etc) via Scald burns or by its specs-backed attacks. Because Azu is a threat and a half, I opted for electric coverage on both Latias and Keldeo since they tend to draw Azu in; Frustration is run on Excadrill to 2HKO Rotom-W after 2 rounds of SR or if Torn-T knocked off Rotom's Leftovers.