Aegislash Xern counter

Aegislash (F) @ Leftovers
Trait: Stance Change
EVs: 252 HP / 72 Def / 184 SDef
IVs: 0 Spd
Sassy Nature
- King's Shield
- Gyro Ball
- Toxic
- Substitute

okay, so in ubers one of the very effective metagames (and also very underrated this gen since no one uses it no more) is toxic sub stall, but only lugia and giratina-a could pull this off, now with the most recent ban to aegi in ou (not effected on PO tiers YET but probably will happen sooner or later cuz OU pussies couldnt handle Genesect) this set seems like a very good mixed wall that TOTTALLY counters xern, set up the sub on geomancy then go for the gyro ball almost guranteed OHKO to +2 Xern, i have tried it and its very affective, a non specs kyogre only does 90% with water spout so aegi can set up the toxic and KS to weaken the Water Spout for the switch, like defensive ghost arceus or some shit, just a nice set that i found usefull since this is the only other pokemon ive seen that was formerly OU that could perform subtoxic stall effectively ty frens :]