Les Règles

When an opposition player is Knocked Down as the result of a Block action performed by this player (on its own or as part of a Blitz action), you may modify either the Armour roll or Injury roll by the amount shown in brackets. This modifier may be applied after the roll has been made. This Skill cannot be used with the Stab or Chainsaw traits.

Q: If a player with the Mighty Blow (+X) skill makes a Block action, and chooses the Both Down result and is Knocked Down themselves, can they still apply the effects of Mighty Blow (+X)? (p.57 & 80)
A: No, as when the Armour roll is made for the opposition player, the player with Mighty Blow (+X) is Prone and so cannot use the skill.

Q: Can a player with both the Claws and Mighty Blow (+X) skills use them together to allow them to break an opposition player's armour on less than 8+ provided by the Claws skill? (p.78 & 80)
A: No.

Q: If a player that is performing a Block action against a player with the Mighty Blow (+1) skill rolls the Player Down! result, can the defending player use the Mighty Blow (+1) skill? (p.80)
A: No, as the player with the Mighty Blow (+1) skill has not performed the Block action.

Q: If a player has both the Mighty Blow (+X) skill and the Claws trait, they cannot use the Mighty Blow (+X) skill to modify the Armour roll due to Claws, but can they still use it to modify the Injury roll? (p.80)
A: Yes.

Q: If a player with Animal Savagery knocks down a friendly model, are they forced to use Claws, Piledriver, Mighty Blow (X+) (or any other Skills that would affect Armour or Injury rolls), or can they choose not to? (p.81)
A: The only Skills the opposing coach may choose for the player with Animal Savagery to use are Claws and Mighty Blow (+X). In this case, treat the Knock Down as being the result of a Block action.

Q: If a player with the Ball & Chain trait moves into a square occupied by a Prone or Stunned player, does the resulting Armour roll benefit from the Mighty Blow (+X) skill if applicable? (p.82)
A: No, as in this instance a Block action wasn't made.

Q: What happens if Grombrindal gives the Mighty Blow (+1) skill to a player that already has that skill? (p.133)
A: It will have no effect.