You can't. You can never do the secret boss of the first portal you enter. You would need to start over and do the portals in a different order, so that you have the fire-walking ability before entering Hunter's Grotto. In that case, you would not be able to reach the secret boss of one of the other portals. The secret bosses give power-ups and, like the health/magicka/stamina orbs, you cannot have all of the power-ups at the same time.

Thanks for the information

jle30303 wrote: »

Septimus_Magna wrote: »

Couldnt you do the secret red boss if you can heal/shield yourself through the lava?

I believe the answer is no, because lava is considered to be like water, you can't cast spells in it while "swimming", and you have to swim in it for so long that your buffs wear out and you then die from being unable to heal.

It's not the lava that's a problem. All the lava in VH is shallow and you can cast, and the path to the secret boss has brimstone orbs along it. But when you get close to the secret boss, there's a fire filled gateway that's impassable. There is a switch to disable it but you can only get there via a wounding portal, so you have to have already finished the blue area.