These cards serve as a backdrop for the battle, offering a continuous effect that applies to both players regardless of who played it
Vigilance is already one of the most underrated abilities in Commander - it protects you for three combat cycles, not just the one - and having the second ability trigger off artifacts, as well as creatures, means every Treasure and Clue grows the beast as a chumpy token creature would
Nowadays you can run them if you're on Mikanko
This squirrel warlock also gives your foods the activated abilities of cards exiled with it, which makes the mana fixing from your Pitiless Plunderers Treasure or your Thornvault Forager that much more important
You're dealing directly with individuals, often locally, and the prices can be excellent or terrible
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