Arcanite Magician with Formula + Librarian especially is threatening in the early game as it is 2400 ATK, fending off most normal summons while threatening to destroy 2 of their cards the following turn and acting as a 1800 DEF wall even without any Spell Counters
This is where Parallel Lives comes in, as it simply doubles all the tokens that you create
An app like Duel Links and now Pocket is a well-balanced compromise for casual fans: you can open packs from the convenience of your phone, for free, or for cheaper than the real product
Well of Lost Dreams, Alhammarret's Archive, and Dawn of Hope make use of Oloro's abilities rather well too
Black can use tutors to dig up the exact winning combination of cards it needs and render an opponent helpless with its hand disruption before using some explosive mana engine or ritual to cast all the spells it needs and end the game in one fell swoop
They can only be initially sourced from the artist and are often purchased with commissioned sketches or paintings on the their blank white backs