yugioh card cyberdark dragon Singles SDCS-EN044 1st Ed End Ultra Rare Cyber Strike Single Card Toys 12 A / D Cyberdark Dragon - Blade Variant

I think that's the key difference

Tutors and Fast Mana: With bans lifted, expect to see Demonic Tutor and Dark Ritual powering out terrifying starts

There are exceptions - certain cards can alter your hand size during play

On the other hand, if a spell or ability deals lethal damage to a creature enchanted with an Aura that has totem armor, the game rules regarding lethal damage cause the Aura to be destroyed, not that spell or ability

Although its unclear what exact function Roshan, Hidden Magister will have overall, it does seem to be particularly good in a disguise/morph build in an assassins deck so you can get assassin attacking triggers for those face-down creatures