If a large creature charges someone behind a palisade, +7 to Initiative to avoid a hit. If the creature fails by 7 or more, deal 1d8 damage.
New combat actions:
Move (to climb): STR+DEX vs target's DEX+DEX-2 to mount the creature
Set Harness on a mounted creature to secure yourself
New combat actions:
Fire: (STR+DEX+2) to hit; deal 1d8 on hit and 1d4 (ignores armor) bleed every turn
Reel In if missed or broken free
The creature can roll STR+STR vs. 10 + the original to-hit roll to escape. If they do, they take 1d6 (ignores armor) damage on escape.