Phantom Train becomes a spirit creature when you activate it, and you know what's really good against spirits
Whispering Specter Whispering Specter throws around some shenanigans before your opponent loses the game to poison counters
Equipped creature gets +1/+1 and has "Whenever this creature deals combat damage to a player, draw a card, then discard a card." Equip Equipped creature gets +1/+1 and has "Whenever this creature deals combat damage to a player, draw a card, then discard a card." Equip Artifact - Equipment Black Market Connections At the beginning of your first main phase, choose one or more Sell Contraband Create a Treasure token
Combine this with an inflated interested in collectible TCGs' rarest targets spurred by the pandemic and, while nowhere near its peak, maintaining a fair bit of popularity on streams and YouTube
Master Duel, these archetypes have been split into different secret packs that can be unlocked by crafting a card from specific archetypes
1 White Sun's Zenith