Hoarfrost Stomp on each weapon class move names inferred
Motion value (MV) is each hit's share of the weapon's attack rating (100 = all of it). The skill plays its own animations for each class, and stance and stamina also depend on the weapon, so each group names the weapon the numbers come from.
Dagger, Straight Sword, Greatsword, Curved Greatsword, Katana, Twinblade, Claw, Whip, Hand-to-Hand, Thrusting Shield, Throwing Blade, Backhand Blade, Great Katana, Beast Claw · on a Dagger
From the player's animation events (the skill's animation set), BehaviorParam_PC and AtkParam_Pc. First hit: seconds at normal speed from the start of the move. "Own base": a projectile with its own base damage that scales with stats, not a share of attack rating.