Yes it will. The conditions are still being met, even if it was an Equip card at time of destruction.
cyberdark horn,cyberdark keel,cyberdark edge
You hope to pull it...
no just its atk and def
Cyberdark Dragon cannot be summoned except by Fusion Summon. Cyber Stein does not 'fusion summon' the fusion monsters is summons, it is only a special summon. It therefore cannot summon monsters like Dark Paladin, or Cyberdark Dragon.
cards for the ultimate Dragon deck is:Chaos Emperor Dragon - Envoy of the End3 Blue-eyes white Dragon Blue-eyes ultimate DragonF. G. D. Red-eyes black Dragon Red-eyes darkness dragon3X Cyber Dragon Cyber Twin Dragon Cyber End DragonCyberdark Horn Cyberdark Edge Cyberdark KeelMasked Dragon Armed Dragon LV3 Armed Dragon LV5Exploder Dragon Twin-Headed BehemothChimeratech Overdragon Cyberdark DragonSpellsFuture Fusion, Dragon's Mirror, Power Bond, Overload Fusion.and you should have Cyber-Stein it's really useful.and photon generator unit and cyber barrier dargon
Your best bet is a cyber or cyberdark deck, with cards like Cyber Dragon for Cyber and Cyberdark Keel for Cyberdark.
Light and Darkness Dragon's first line of text says that it cannot be special summoned. Therefore when it is destroyed and its last effect triggers, it cannot choose itself.
You can only activate and Special Summon "Red Eyes Darkness Metal Dragon" with this effect from your hand.
I got this from a Zane Truesdale Duelist Pack, it doesn't show how many of one card he has, but its a start. This is light and dark Zanes deck I think. Cyber Dragon Cyber Barrier Dragon Cyber Laser Dragon Proto-Cyber Dragon Cyber Kirin Cyber Phoenix Cyberdark Horn Cyberdark Edge Cyberdark Keel Infernal Dragon Cyber Twin Dragon Cyber End Dragon Chimeratech Overdragon Cyberdark dragon Mystical Space Typhoon Limiter Removal De-Fusion Creature Swap Different Dimension Capsule Power Bond Photon Generator unit Overlode Fusion Future Fusion Ruthless Denial Call Of The Haunted Trap Jammer Attack Reflector Unit Return Soul Damage Polarizer Fusion Guard
No, the text for Cyberdark Dragon says: "This monster cannot be Special Summoned except by Fusion Summon..."
If you mean, is it destroyed when it 'levels up', then no. It is simply 'sent to the graveyard', it is not a 'destroy' effect and cards that look for or trigger from something being destroyed, will not activate.
Marshmallon has a Trigger Effect that deals damage and a continuous effect that prevents it from being destroyed by battle. If a face-down Marshmallon is attacked, it will first be flipped face-up. You will then calculate damage - unless LaDD's ATK has been reduced severely, more than likely no damage will be dealt. If LaDD's attack is higher, it doesn't matter as Marshmallon cannot be destroyed by battle. Marshmallon's effect will then trigger, Light and Darkness Dragon will chain to it and negate it, so no damage is dealt. Note that Light and Darkness Dragon does not destroy the cards he negates, so Marshmallon will remain on the field. Also note that Light and Darkness Dragon can do nothing to continuous effects as they do not 'activate'. That means he can do nothing against Marshmallon's battle protection.