ADVENTURERS! MtG cards!

Well, among the basic abilities, first strike seemed the most appropiate. I thought that it was the most appropiate for a counterblow to Eternion. Being able to finish him quickly was probably the only way to finish him at all the other eternals had. And, as you said, it was most probably created by infinel. Infinel does not like his people getting hurt. First strike is the only ability that lets a creature take down an opponent of similar strenght without being obliterated himself. That was the quick reasoning i did, a reasoning that has a few flaws, I admit. Should have thought a bit more. Maybe vigilance would fit better, as Wizards uses it as a defense-flavor element (many vigilance cards are guards, sentrys, or the like, as you know)

Yeah, both swords were so similar that i didn´t notice the little difference. Since Kyuukyouku is supposed to adapt to enemy´s stength, and not wielder´s, it might be tricky to get an ability for it. I suppose we could always do the mirror of the Mugendai-Yaiba, and let it say "when equppied creature blocks or is blocked, it gets +X/+0, where X is the thoughness of target creature blocking it". But that is extremely uncreative, isn´t it?

About Imposis title, since it has never been stated, i was thinking about "Eternal of knowledge" or something of the sort. He really looks like he´s a brain among the eternals.

The eternals´ colors you say seem right, except... that cycle wouldn´t let Eternion be black, or part black, and he really fits that role. Omnipotence is black´s greatest desire, and egoism a very important feature in most black characters. That sounds Eternion to me.

Anyway, thanks for the advice, Milo! This is quite difficult for me so your help is greatly appreciated.

Also, I´d love to have your opinions on the cards I already made, in case you feel they should be changed. This is to everyone that thinks they can help. I could try to do this alone, but then only I would really like the cards, and that would be no fun. Any oppinion will probably be taken into account. And i know that there are talented people out there, you could try doing a few cards yourselves and posting them. Hey, to be fair, yours will almost surely be better than mine :)