I just came up with a great set for terrakion. It mixes all aspects of its sets into one to create a monster.
Terrakion is a beast in the metagame. The most common variant is the choice scarf variant that is one of the best revenge killers in the game. It allows terrakion to revenge volcarona, salamence, Latios, Gengar, starmie, tornadus, thundurus, Keldeo, you name it. However the big problem with scarf terrakion was that it was walled by gliscor and I guess Landorus-t now. Another problem was that it was weak to priority. Scizors's bullet punch, azumarill's aqua jet. And now, damn techniloom's Mach punch. So people came up with a new set. The Substitute + Swords Dance set. This allowed terrakion to deter priority as a close combat kills all of them, and to smash right through gliscor and slowbro. But this set had trouble with faster threats like starmie, Latios, Latios, Gengar, tornadus (both forms), and scarf mons like jirachi, terrakion, salamence, and Rotom. Well my set fixes all these problems.
Terrakion @ Salac Berry
Nature: Jolly
Ability: Justified
4 HP / 252 ATK / 252 SPD
-Substitute
-Swords Dance
-Close Combat
-Stone Edge
This is the set.
And here's how it works. This works very much like the double dance variant with a mix of substitute terrakion and scarf terrakion. If one sees a wall like gliscor, and priority users like scizor or even faster scarf mons (so in all cases LOL) set up a substitute. In the case of gliscor, swords dance up and OHKO (with some previous help). In the case of priority, let the sub take the hit and OHKO. In te case of the scarf user, take the hit and OHKO. Now the problem with the solely-substitute set was that terrakion was vulnerable to a combination of this. Let's say youve got a priority user against a substitute, and waiting on the wings is a tornadus. In this case, a substitute set would die as the second hit from tornadus, which outspeeds, will kill it after the bullet punch kills the sub. However, all is different with this subsalac terrakion. If you are face with a scizor, (in which case you should have a sub out on the switch), do not stack untill Salac berry is activated. At one point (I'm not sure if it's at 1% or 24% with the sub number), your berry will activate, and you will be left with a sub. In this case, the bullet punch will kill the sub, and you are now a scarf terrakion that can switch moves. BRILLIANT.
There are some problems, you guys might say. "The Salac berry is only one use, it's useless!" well when Salac berry is lost, terrakion just plays as a regular Subsitute + Swords Dance variant. No problem. They mostly carry rock gems, which is one use only.
This terrakion is great in other ways too. Terrakion was built for this set. Lemme tell you why is such a great Pokemon in the new metagame.
1. Typing.
Rock/Fighting might give it some nasty weaknesses, but it's great for terrakion. I know that we all know how great his STABS are. But, I want to talk defensively. It's typing (mostly rock) gives it a sandstorm immunity and a Sp.Def boost. This means two things. 1: terrakion can substitute freely without worrying about weather damage (screw you hail). Another thing is that it's sp.defense boost allows it to switch into many attacks to trigger the Salac berry. IIRC, tornadus's hurricane in sand and starmie's surf NEVER OHKOes (I think). So terrakion can switch into these attacks and serve as a great revenge killer.
2. The Substitute
Another great thing about this set is substitute. It is very hard to find a true sweeper these days. It's even harder with priority everywhere (scizor, breloom, mamoswine) and very importantly, DITTO. However, this set fixes EERYTHINNGG. Substitute allows terrakion to avoid these priority and to troll ditto. Substitute makes this terrakion awesome.
I have used this in OU and it is the best thig ever. Better than Amoonguss, I must say. Which brings me to my next point: it can set up on common defensive pokes thanks to its Subsitute (fuck you spore).
This terrakion is awesome and I hope you guys enjoy this set I made
SUB SALAC TERRAKION FTW
EDIT: changed Hp evS