Scarf Haxorus. Not many People use it, but it acts as a great revenge killer to multiple things, the honorable mention being a DDNite at Full Health (Mold Breaker).
I don't know if anyone uses it, but Choice Band Virizion is very great anti-lead in a post-Deoxys metagame.
Virizion@Choice Band
(+Spe, -Def)/Justified
252 Att/4 SpAtt/252 Spe
-Close Combat
-Leaf Blade
-Hidden Power (Ice)
-X-Scissor
the Leads
6) Dnite- Hidden Power Ice 2HKOs
if you get 2 hits off then great:
Dragonite (Mild or Hasty) @ Expert Belt
Ability: Marvel Scale
EVs: 252SA/___/____ (64 HP / 192 Spd / 252 SAtk or 4 HP/ 252 Spd / 252 SAtk (mild), 56 HP/ 200 Spd / 252 SAtk (hasty))
- Hurricane
- Ice Beam
- Flamethrower
- Focus Blast
Surprise Special Specialist I'm building for VGC...I can see STAB Hurricane + Belt OHKOing Verizion (who has double weakness if I'm not mistaken).