u/InfluenceRough6729

Abilities:

Refrigerate, Snow Warning and NEW Multiscale

Stat Changes:

Atk: 77 to 64
Def: 72 to 85
SpA: 99 to 112
SpD: 92 to 100
Spe: 58 to 66

New Moves:

Moonblast, Aurora Veil, Volt Switch, Recover, Power Gem, Magic Coat, Focus Blast

I think Aurorus would actually be viable and possibly even good in OU as a lead, despite its terrible typing. The role compression it provides as a pivot, rocks setter, and veil setter is so valuable imo.

Plus it becomes incredibly bulky on the physical side as if you invest in defence and go bold, it is almost as bulky as regirock under snow