yugioh arrow card "Rocket Express" SLF1-KR001 Korean Ver Super Rare the Prince of Endymion Yu-Gi-Oh - Arrow of Regulus

They are only handed out at card shops that host official Yu-Gi-Oh

It cant be blocked, targeted, dealt damage, or enchanted by anything they control

8 Super Rare cards, as well as 1 Common card, are also available as Over Rush Rare.

Though even for this kind of stuff, it's not uncommon to see a mono-coloured deck splashing another colour (if you're unfamilar with the term, it means adding one or two cards of another colour but not commiting to that colour for the deck)

You can obtain the Grafaiai (3-Diamonds rarity) card by opening Shining Revelry from Shining Revelry set

Xyz (black): A monster that must be Xyz Summoned