Once a card such as Chaos Sorc, or a ritual monster, and most fusions are properly summon(by the proper ritual spell cards, removing a light and dark, or by properly fusing them(fusion gate/poly) then they can be revived from the graveyard by normal means such as premature burial, monster reborn, call of the haunted.

There are a few exceptions to this, such as monsters that can ONLY be special summoned a certain way. Thos cards can NEVER be summoned from the graveyard or any other place outside of their intial summoning.

If your opponent's BLS were to be destroyed after it was properly summoned, yes you could summon it to your field with Autonomus action unit, or monster reborn since he was properly summoned.

Keep in mind if any of the monsters were returned the the hand, deck or fusion deck, all requirements are reset, and need to be meet again.

I meant if I were to use his effect.

Nothing less, of course.

If they were destroyed then sent to the graveyard, you could NOT use the method of removing a light/dark to summon them from the graveyard. You can only do that when they are in your hand.

All caps I use is just to add some emphasis, not for yelling.

I got this, Venom.

1) "This card can only be Special Summoned by removing one LIGHT and one DARK monster in your Graveyard from play."

Sound familiar? This is the summoning requirement of the two Chaos Envoys and the Chaos Sorcerer. If you have met this requirement and the card is sent straight to the Graveyard, you are allowed to summon it again because it was properly summoned the first time around. The same thing goes for any monster that says "This card can only be Special Summoned by..."

2) "This card cannot be Special Summoned except by the effect of Horus the Black Flame Dragon LV6."

This is the summoning requirement of Horus the Black Flame Dragon LV8. Notice the difference in wording. With this card, there is only one way to summon it. Period. The only exception to the rule is with LV cards and Level Up! Otherwise, there is no other way to summon them. Sorcerer of Dark Magic can only be summoned by offering two Level six or higher Spellcasters. Archlord Zerato can only by summoned by offering Warrior of Zera while you have The Sanctuary in the Sky both on the field. Pretty much the same with Mazera DeVille, but Pandemonium has to be on the field instead.

In short, if it says "This card can only be Special Summoned by..." then you can summon it from the Graveyard without meeting the requirement again provided was summoned properly. But if the card says "This card cannot be Special Summoned except by..." then there's only one way to summon it. Period.

You're asking if you can remove a Light and a Dark to Special Summon from the Graveyard without the use of such cards as Premature Burial and the like, yes? Well, you can't. You got screwed.

Basically, if it doesn't say it can be brought back from the Graveyard by Special Summoning, then it can't. In fact, there are only a handful of cards that bring themselves back, like Vampire Lord, Cockroach Knight, and a couple others that I can't remember ATM.

That's exactly what he's saying. Unless the card says otherwise, those kind of effects must be activated from the Hand.

-Sigh-
I thought as much.

Now that I have discovered a few official rules about chaos Monsters and Creature Swap within the past five minutes, I need to demand some rematches.

Thank you all for your assistance and happy duelings.

Isn't that what I said in my second post of this thread?

Yep, I guess the guy was not happy because I said destroyed, and not tributed, though it still fits his question.

If you properly Fusion Summon a Fusion monster, Ritual summon a Ritual monster or meet the special summoning requirements of a special summon only monster, you can use cards such as premature burial and call of the haunted to special summon it from your graveyard (you do not have to meet the requirements again unless it is sent back to your hand or deck somehow). The exceptions to this are one's that say such text like "This monster can only be special summoned through a Fusion summon..." or "This card cannot be special summoned except...." and so on.

In the case of Chaos Soldier, if he was properly special summoned by your opponent and then sent to the graveyard afterwards, you may use cards like Monster Reborn or Autonomous Action Unit to special summon to your side of the field from their graveyard. The same going for fusions, rituals and other special summon monsters (except for the one's with the text or similar text stated above)