The Rulings say this

CAN I USE "MONSTER REBORN" ON MY "ARMED DRAGON LV7"? Added January 2005


No, you will never be able to Special Summon “Armed Dragon LV7” with “Monster Reborn” because “Armed Dragon LV7” is a monster that can only be Special Summoned by the method described in its text. These monsters can be identified by the text “This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by …”. This means that the method described after the “except by” is the only way that monster can ever be Summoned. This prevents it from being Special Summoned from the Graveyard with “Monster Reborn”, “Call of the Haunted”, or any other effect, even if it was properly Summoned by its own effect first.
Some earlier prints of cards do not have the “This card cannot be Special Summoned except by…” text, but are still included in this category of monsters. These cards include “Exodia Necross”, “Berserk Dragon”, “Mirage Knight”, and the XYZ Fusion Monsters.




CAN I DISCARD "DARK NECROFEAR" AND USE "MONSTER REBORN" ON IT?


Certain monsters cannot be played with a Normal Summon or Set, only via a Special Summon. Examples of such Special Summon-only monsters include Fusion Monsters, Ritual Monsters, Toon Monsters, "Gate Guardian", "Great Moth", "Wall Shadow", "Dark Necrofear", "Spirit of Flames", "Aqua Spirit", "The Rock Spirit", "Fenrir", "Chaos Sorcerer", etc.

Fusion Monsters and Ritual Monsters have standardized methods to play them. All of the other monsters listed have specific methods written on the cards as to how to play them. You cannot play these monsters by any other method.

If a Special Summon-only monster is successfully Special Summoned to the field, using the proper method, and is then sent from the field to the Graveyard, you may use "Monster Reborn", etc. to revive the monster back to the field, and you do not have to use the proper method again. (For example, if you Special Summon "Aqua Spirit" by removing 1 WATER monster in your Graveyard from play, and "Aqua Spirit" is then destroyed and sent to your Graveyard, you may use "Monster Reborn" on "Aqua Spirit" without having to remove another WATER monster in your Graveyard from play.)

However, if a Special Summon-only monster is placed in your Graveyard because it was discarded from your hand, or some other method that did not involve the monster being Special Summoned to the field using the proper method, you cannot use "Monster Reborn", etc. on the monster.

The proper method to summon a Fusion Monster is via a "Fusion Summon". A Fusion Summon can only be performed using "Polymerization" or "Fusion Gate". Any other method of playing these monsters is not a proper summon, and if the monster is then sent to the Graveyard it cannot be revived with "Monster Reborn". Some Fusion Monsters have additional restrictions.

For example: "Dark Paladin" has the text, "This monster can only be Special Summoned by Fusion Summon." This means that you can Fusion Summon "Dark Paladin" from your Fusion Deck using "Polymerization" or "Fusion Gate". You cannot Special Summon "Dark Paladin" from your Fusion Deck using "Magical Scientist" or "Summoner of Illusions" or "Metamorphosis". Even if "Dark Paladin" is Fusion Summoned properly, you cannot "Monster Reborn" him because this would be a Special Summon that is not a Fusion Summon.

"Dark Balter the Terrible" has the text, "This monster can only be Fusion Summoned by the above Fusion-Material Monsters." This means that you cannot use "substitute" Fusion Monsters like "Goddess with the Third Eye". You CAN Special Summon "Dark Balter the Terrible" with "Magicial Scientist", "Summoner of Illusions", etc., because "Dark Balter the Terrible's" text only restricts Fusion Summons, not Special Summons in general. If "Dark Balter the Terrible" is properly summoned, you can use "Monster Reborn", etc. to revive him from the Graveyard.



WHAT IS THE DIFFERNCE AND HOW CAN YOU TELL THESE MOSTERES APART

Their Special Summon text.

"This card can only be Special Summoned by..."
You can use "Monster Reborn" on it after being properly Summoned.

"This card cannot be Special Summoned except by..."
You cannot Special Summon it in any way except the way described, even after being properly Summoned.

oooooooo ok i thaught so id rather ask here and be safe than sorry and get stomped in a turment because of a imple mistake