We asked TCG player about funny and interesting card nicknames, and here are some results!

Because Magnum"hut" is typically used to deliver (search) a Dragon-type monster at the End Phase.

Because they have a higher rarity than in Japan, and thus more expensive (i.e. requires more "cash" to play).

Fenrir in particular is Ultra Rare and one copy of him can cost up to 100 dollars.