Evilswarm Castor Versus Effect Negation

UPDATE: For the people who have read this article so far, the old ruling on this effect has been overruled as of 15 May 2013. The source of that ruling is here:
http://www.konami.com/yugioh/articles/?p=4956

I'll leave the rest of the article up for anybody who is interested in what the ruling used to be and why.

For several weeks now, articles and videos have been making their way around the internet which assert that general monster effect negation will prevent Evilswarm Castor and Constellar Pollux from conducting their second Normal Summon. This information is contrary to most combinations of reading comprehension and knowledge about Yugioh rulings, thousands (probably) of rulings from Dueling Network admins, and even OCG rulings on Castor and Pollux. This information is also completely true. In case that's not direct enough, Evilswarm Castor, Constellar Pollux, and similar effects can be negated (prevented) by cards like Effect Veiler, Fiendish Chain, Skill Drain, Breakthrough Skill, etc. if you play in the TCG. The articles I have seen so far did not bother to explain why, so I'll fill in that blank here.

To start the explanation, I think it's important to say that people who think that Evilswarm Castor et al. should not be negated by Veiler etc. are not wrong. I've had discussions about it with other competent judges and a few DN admins (before anybody remembered that this effect already had existing TCG rulings) and we all came to the same conclusion. The OCG ruling even supports this conclusion. There is nothing wrong with using OCG rulings for an OCG card on Dueling Network. For those of us stuck in the TCG though, Evilswarm Castor and Constellar Pollux already have rulings. More precisely, their effect has already been ruled on.

Castor and Pollux are not the first monsters to have the effect During the turn this card was Normal Summoned, you can Normal Summon 1 "<archetype>" monster in addition to your Normal Summon/Set. That honour belongs to Dverg of the Nordic Alfar (I think), who was debuted in the TCG at a time when Konami still released rulings on the latest set to the official North American website. To be clear, this is the exact same effect. The only difference in the TCG text between the two is the transition between Problem-Solving Card Text and the old text. You can even look at pictures of the Japanese cards and the first two lines are identical except for the archetype name. Rulings that apply to Dverg's effect apply to Castor and Pollux's effects, because these cards share the same effect.

Rulings on this effect are available in this pdf, which is hosted on the official North American Rulings and Errata page. To save you some time reading, the differences between the OCG and the TCG are this:

•Dverg must be face-up on the field when you attempt the extra Summon.

•If Dverg’s effect is being negated, you cannot Normal Summon the extra monster.

•You cannot Normal Summon an extra monster with Dverg’s effect if you Normal Summon Dverg during your opponent’s turn with Ultimate Offering, but if your opponent gains control of Dverg afterwards, he can perform the extra Summon.

There isn't really any reasoning for this that I can discern. Kevin Tewart, or Julia Hedberg, or some other person, or maybe even some group of people, decided that they didn't agree with the way that Dverg of the Nordic Alfar worked in the OCG. Regardless of how we got here, this is how Evilswarm Castor and Constellar Pollux work in the TCG and this incredible loss of power is something that TCG players are going to need to deal with until such a time as the ruling is changed.

EDIT: Such a time is now! The ruling has been changed as of 15 May 2013.