[Snake]

That's a good idea, but the effect shouldn't be solely tied to Charge, I feel. How about...

- Moving grants a buff that increases the damage of Ram by 10 per tile you move, up to a cap of Scaled STR. Upon using the skill, you will deal X blunt and pierce damage, split evenly.

- If you have moved more or equal than 3 squares, it will also have a stat-check chance to inflict Knockdown.

- If you have Charging Strike active, it will gain a bonus effect: The knockback cannot be resisted. If the knockback is interrupted by a solid object, they will take (Charging Strike damage) damage as Blunt damage. If the object is an enemy, the enemy also takes the same damage and is knocked down. (Infliction chance is 80% of original in this case).