"Dark Magician" is a Level 7 Spellcaster Normal Monster with 2500 ATK/2100 DEF, and there are cards that "Dark Magician" is involved with like "Dark Magician Girl" (whose effect can increase her own ATK by 300 for each "Dark Magician" is in the Graveyard), "Skilled Dark Magician" (Tribute itself when it has 3 Spell Counters to Special Summon "Dark Magician" from the owner's hand, Deck, or Graveyard), "Dark Magic Attack" (destroy all Spells/Traps on the opponent's field when "Dark Magician" is on the owner's field), "Dark Magic Curtain" (pay half of the LP to Special Summon "Dark Magician" from the owner's Deck), and "Miracle Restoring" (remove 2 Spell Counters on the owner's field to Special Summon "Dark Magician" or "Buster Blader" in the owner's Graveyard onto the field)
Another popular monster from the time is Joey Wheelers signature monster, the Red-Eyes Black Dragon
Summon this monster from hand last
The other option was white, which brought with it Path to Exile, and this was seen in decks like Jeskai Control and Naya Zoo
Yes, you can add 1 card or play it even if only 1 card is revealed