Haorus:
haxorus is whay I built the team around. Haxorus is an extremely dangerous stall/balance breaker and it destroys slower teams. Outrage is haxorus's most powerful attack and does a lot of damage to whatever switches on it exept for steel and fairy types. Poison jab hits most fairies and helps with clefable. Earthquake hits steel types ans rotom without getting locked into outrage.

Magnezone:
Magnezone helps trap things like skarmory, scizor and ferrothorn. It also checks water types and has good synergy with haxorus.volt switch helps get momentum, flash cannon hits fairy types that haxorus doesn't like, and the best example would be diancie.

Skarmory:
So I decided to add a skarmory wich helps check diancie, since it can outspeed and ko haxorus and hit magnezone with earth power on the switch. Skarmory can switch into the latis's STABS and works as a good dragon switch in in general.

Keldeo:
Keldeo is my bulky ground check wich magnezone has problems with. before adding keldeo the team looked weak to weavile anf bisharp so I decided to add a keldeo as my check to them. Rest sleep talk keldeo is my favourite set right now, it avoids being worn down easily and can fire off some strong attacks.

Mega altaria:
Mega altaria pairs well with haxorus and magnezone completing a drafon/fairy/sell core. The reason why I chose altaria is because I needed a fighting resist that xan beat most of gaxorus's check. Special altaria is one of the best sets right now, hyper voice is mega altaria's main STAB that hits fighting and dragon types Earthquake and fire blast hit pokemon that resist hyper voice.

Landorus:
Landorus Helps me check talonflame, garchomp and lopunny and it also provides stealth rock support, wich makes haxorus even harder to switch into. Its also the team's defensive backbone that helps deal with many physical attackers. I chose to give it a rocky helmet over Leftovers to weaken physical attackers and with the combination of stealth rock + rocky helmet physical attackers will be taking a lot of damage while Landorus takes very less damage because of Intimidate.