This skill is a Special Rule that is only available to specific Star Players. Please visit this page to find a list of current and past Blood Bowl Star Players.
Gored by the Bull
Once per game, when Grashnak performs a Blitz action, Grashnak may roll one additional Block dice against the opposition player, regardless of the opposition player’s Strength, to a maximum of three Block dice. If Grashnak performs a second Block action due to the Frenzy skill, this second Block action will also benefit from this rule.
As Grashnak is strength 6 and has the horns skill, if you are careful with assists then he can Blitz opposing strength 3 (or less) with three block dice already. Due to that I can see this being used against stronger opponents on the other team, ideally taking two dice up to the maximum of three. If you can also do this to shove them into the crowd then even better. I would likely pick a target who is likely to cause you the most problems, especially if you can follow it up with a foul if the block doesn’t result in removing them. Another option is if there is a Stand Firm player in your way that you really need to knock over, getting a potential six block dice against them (or nine dice if you want to try throwing a Loner reroll at it) could be your best option.
There is a case to using it against a weaker opponent if its your best chance of getting them down. For example a Block + Dodge + Side Step player when you don’t have anyone with Tackle. Even if they don’t have Side Step the opposing coach might position them well enough to avoid giving away three dice blocks.
Technically you could throw a 4 die block with this.
I think the part of the rule that says, “to a maximum of three Block dice”, might hinder that. 🙂
What if he blitzes a stronger opponent, e.g. a Deathroller with an assist (ST8)? Would the ‘2D against’ become 1D or would the extra dice make it even ‘3D against’?
It’s an extra dice against the opponent, it would become a one die block (to be against a negative you have to remove it).