Ancient Warriors relies so heavily on their Continuous Spell Cards, and if they happen to be removed from the field by means other than through paying the cost for your Ancient Warriors monsters effects, you are losing out on a lot
Or have a specific collectors goal in mind, like hoarding every Goblin card ever printed
As Duskmourn: House of Horror is based on Betrayal at House on a Hill, a game in which one or more players will betray their party and seek to destroy them (as the opposing players must defeat the betrayer), this slotted perfectly inline with Archenemy's mechanics
Avoid Overprinted Popular Cards: Well-loved cards arent always rare
Still a top pull, but likely a lower chase for most
More often than not, Mushroom Watchdogs ends up being a Runeclaw Bear, which is actually surprisingly decent in green decks