I'm going to nominate Spike Stack Offense. While Spikes do not hurt Tornadus-T, DNite, and Thundurus-T, it will heavily hurt Genesect, who absolutely HATES passive damage. It also hurts big threats that resist Stealth Rock such as Terrakion. It also applies pressure on U-Turners not named Landorous, as switching has a much more punishing side-effect due to the Spikes Damage. Plus, anything Spikes doesn't hit gets hit decently hard by Stealth Rocks. I feel that we as a community can make an effective Spike Stacking Offense team.
Potential pokemon for Spike Stack are Deoxys-D and Landorous. Deoxys-D can easily set up Spikes and Stealth Rocks, much like his brother Deo-S. Meanwhile, Gravity Landorous is probably the first competitive use of Gravity outside of the gimmicky Gravity Team. He is an interesting choice due to allowing everything to be hit by Spikes for 5 turns.