Firewall →Used Deck

Considering the time of its appearance, it seems that O'Brien's wall of fire was designed to be used in conjunction with his Volcanic.
Only the point that it can prevent the opponent's direct attack many times in one turn is quite tenacious and can not be said to be weak. Also, as one of its few strengths, it can prevent as many direct attackers as possible.
However, for some reason, attacks other than direct attacks cannot be prevented, and for some reason maintenance costs are required despite the narrow response range. ・・・I can't imagine it being strong enough to require a maintenance cost, even from the beginning of its appearance.
Moreover, the maintenance cost is quite painful at 500 LP.
In addition, this card has a drawback, it is necessary to remove his Pyro monster in his GY as the cost of the effect, but Pyro is a bad match for removal, and if you remove it blindly, you will instead lose your neck. You end up narrowing it down. Conversely, it can be used to exclude Pyro.
A weak and poorly matched card. With a little more finesse, it seems like it would be a pretty good card...
Just in case. If his Pyro monsters and categories that are compatible with removal appear in the future, the rating may change. However, the downside is that it is only for direct attacks and requires maintenance costs.

His Firewall, not the real flame wall that appeared in the GX period, but Firewall.
You can continue to stop the opponent's direct attacks as long as it lasts for the removal cost of GY's Pyro, but Pyro and the theme to which it belongs a lot and removal are not so compatible, and it is difficult to protect monsters from battle destruction. Due to its low versatility, it is one of the few trap cards that has effects related to Pyro, but its performance is still not good.
On top of that, there's also the upkeep cost of paying LP for a Continuous Trap with this level of effect, although it's not very heavy.
I want to say that he pays the cost each time by banishing GY's Pyro, but there is no turn 1, and it's a card from this period, so it can't be helped.

Comprehensive evaluation: If it surpasses an attack, there are other options.
It can prevent the opponent's direct attack, but it requires a GY cost and cannot be used many times.
It's easy to rely on Burn Cards to fight without keeping monsters on the field, so dealing damage with Dimension Wall is easier to win.
If you attack mainly with Pyro and protect the openings with 《Spiritual Fire Art - Kurenai》etc., you might be able to use it somehow.

FWD? I don't know this child. The effect itself isn't too bad, but the chance to activate it is rare.

It has nothing to do with some dragon that doesn't weigh itself down.
It's good that the cost is cheap and you can use it permanently, but it's too late when you declare an attack. It is passive even for exclusion purposes.
I wonder if it's practical.

Although there is no limit to the number of times one turn can be used, the GY cost is a bit heavy and it only supports direct attacks, so it is a bit of a delicate card as a defensive card. The maintenance cost is also painful. It's a card that could have an interesting role if you can make good use of its removal.

PC Firewall and thought www

Blocking attacks using GY ad. It was plain annoying in DT...
Even though it's a makeshift card and requires a maintenance cost, it's not bad to be able to stop multiple attacks with just his GY card.
However, this is said to be incompatible with the Royal Guards...
I thought it was funny when I saw someone put this into Laval the other day.

with a scarecrow
Pyro has a heavy cost.

A firewall made of fire.
DEF is quite good because it can block the opponent's direct attack quite tenaciously.
It's just a stopgap card that can't really be improved, it's weak against removal and he rots in the early game when GY isn't enough. Ultimately, is it difficult to beat offensive reaction traps that can protect monsters, and defense cards such as reconciliation and roar?
Burn-type decks with a lot of Pyro monsters might be useful as a defensive method. On the other hand, Volcanic has a lot of her GY recovery, so he is a deck, so this card is not good enough. Is it possible to use Laval with exclusion collection ...?