Here is a set that isn't exactly creative, just a standard set with a twist:
Landorus-Therian (M) @ Leftovers
Trait: Intimidate
EVs: 252 HP / 4 Atk / 252 Def
Relaxed Nature
- Earthquake
- Hidden Power [Ice]
- U-turn
- Stealth Rock
I really like Hidden Power Ice for two main reasons: Stone Edge's accuracy sucks and can cost you games, and HP Ice hits so many important stuff that Stone Edge can't, namely Garchomp, Landorus-T, Landorus, Gliscor, and Breloom, all of which don't get 2HKOed by any of Landorus-T's usual moves (except for Garchomp which is 2HKOed by EQ). I am using this set alongside with Choice Band Tyranitar, and so i don't need any SpA EVs to OHKOs Dragonite after SR, as Dragonite takes 65% min from HP Ice, a OHKO after SR and 2 rounds of sand damage (one as you bring Landorus-T in and the other one finished off Dragonite after you hit it with HP Ice). Here are some other cool calcs of HP Ice compared to the damage that Stone Edge or EQ (with the on-site spread for the physical attacks) would do on some Pokemon:
- 0 SpA Landorus-T Hidden Power Ice vs. 4 HP / 0 SpD Garchomp: 244-288 (68.15 - 80.44%) -- guaranteed 2HKO after Stealth Rock
- 64+ Atk Landorus-T Earthquake vs. 4 HP / 0 Def Garchomp: 178-211 (49.72 - 58.93%) -- guaranteed 2HKO after Stealth Rock
- 0 SpA Landorus-T Hidden Power Ice vs. 0 HP / 0- SpD Salamence: 284-336 (85.8 - 101.51%) -- guaranteed OHKO after Stealth Rock
- 64+ Atk Landorus-T Stone Edge vs. 0 HP / 0 Def Salamence: 276-326 (83.38 - 98.48%) -- guaranteed OHKO after Stealth Rock
- 0 SpA Landorus-T Hidden Power Ice vs. 4 HP / 0 SpD Breloom: 158-188 (60.3 - 71.75%) -- guaranteed 2HKO after Stealth Rock
- 64+ Atk Landorus-T Earthquake vs. 4 HP / 0 Def Breloom: 103-122 (39.31 - 46.56%) -- guaranteed 3HKO after Stealth Rock
- 0 SpA Landorus-T Hidden Power Ice vs. 0 HP / 4 SpD Landorus: 252-300 (78.99 - 94.04%) -- 43.75% chance to OHKO after Stealth Rock. If Landorus sets up with Rock Polish, which it will most likely do against a Landorus-T that can't usuallt hurt Landorus and will most likelt switch out, it will be left with less than 10%, meaning that it will die if from LO recoil if it wants to get past Landorus-T
- 64+ Atk Landorus-T Stone Edge vs. 0 HP / 0 Def Landorus: 125-148 (39.18 - 46.39%) -- 25.78% chance to 2HKO after Stealth Rock
- 0 SpA Landorus-T Hidden Power Ice vs. 200 HP / 0 SpD Landorus-T: 252-300 (68.29 - 81.3%) -- guaranteed 2HKO after Stealth Rock
- -1 64+ Atk Landorus-T Stone Edge vs. 200 HP / 244 Def Landorus-T: 66-78 (17.88 - 21.13%) -- possible 6HKO after Stealth Rock. It is also worth noting that HP Ice Lando-T will be slower than Stone Edge Lando-T and thus will have the upper hand in U-turn wars
- 0 SpA Landorus-T Hidden Power Ice vs. 252 HP / 0 SpD Gliscor: 268-316 (75.7 - 89.26%) -- 12.5% chance to OHKO after Stealth Rock
- 64+ Atk Landorus-T Stone Edge vs. 252 HP / 184+ Def Gliscor: 74-88 (20.9 - 24.85%) -- possible 6HKO after Stealth Rock
And some of those 2HKOes that Stone Edge gets are much shakier than they seem due to the bad accuracy. For example two Stone Edges have a 64% chance of hitting twice, so the chance of Landorus-T 2HKOing Landorus with Stone Edge is smaller than 25.78% after SR. The lack of Stone Edge is not a big issue as the only targets that Thundurus-T can't hit hard without it are bulky Kyurem-B, Gyarados, Rotom-W, and Gengar. Out of those Pokemon, U-turn is almost always a better option to use as they switch in (except against Gengar which gets OHKOed by Stone Edge), and the only situation that Landorus-T would get to hit those Pokemon that otherwise outspeed and OHKO or severly dent Landorus-T. The lowered Attack doesn't make Landorus-T lose any relevant OHKO-2HKO, while the extra Defense comes very handy. Here are some calcs showcasing the usefulness of the extra psysical bulk:
- -1 252 Atk Choice Band Garchomp Outrage vs. 252 HP / 252+ Def Landorus-T: 153-180 (40.05 - 47.12%) -- 1.95% chance to 2HKO after Stealth Rock
- -1 252 Atk Choice Band Garchomp Outrage vs. 200 HP / 244 Def Landorus-T: 168-198 (45.52 - 53.65%) -- 95.7% chance to 2HKO after Stealth Rock
- +1 252 Atk Garchomp Dragon Claw vs. 252 HP / 252+ Def Landorus-T: 153-180 (40.05 - 47.12%) -- guaranteed 3HKO
- +1 252 Atk Garchomp Dragon Claw vs. 200 HP / 244 Def Landorus-T: 168-198 (45.52 - 53.65%) -- 1.17% chance to 2HKO. The chance becomes much bigger when you take into account the 6.25% damage that Landorus-T will have taken from SR (12.5 - 6.25 = 6.25% where 6.25% is the damage that lefites will have healed as Landorus-T came in and Garchomp used SD)
- +1 252 Atk Rock Gem Terrakion Stone Edge vs. 252 HP / 252+ Def Landorus-T: 282-333 (73.82 - 87.17%) -- guaranteed 2HKO
- +1 252 Atk Rock Gem Terrakion Stone Edge vs. 200 HP / 244 Def Landorus-T: 312-367 (84.55 - 99.45%). Possible OHKO after SR.
- +1 252+ Atk Life Orb Technician Scizor Bullet Punch vs. 200 HP / 244 Def Landorus-T: 179-212 (48.5 - 57.45%) -- 46.09% chance to 2HKO
- +1 252+ Atk Life Orb Technician Scizor Bullet Punch vs. 252 HP / 252+ Def Landorus-T: 164-192 (42.93 - 50.26%) -- guaranteed 3HKO
With the added defense Landorus-T handles much better many common physical setup sweeprs and takes physical hits better in general, which is always helpful as tanking physical hits is one of Landorus-T's main roles.
Finally, the -Speed nature doesn't bother Landorus-T at all, as the only Pokemon that outspeed it now is 0 Spe Rotom-W, which counters HP Ice Landorus-T anyway, so it's not really an issue.
tl;dr USE HP ICE MAX HP / MAX DEF+ LANDORUS-T PEOPLE!