Clearly good in the 99 of the Tom Bombadil sagas deck, Goldberry also shines in superfriends and proliferate decks
This should get you off to a good start with the Night Witch: you can also watch Baba Lysaga (or Baby Lasagne) played in one of my favourite episodes of Tolarian Community Colleges Shuffle up and Play series, focused on Budget Commander decks, which should give you some additional ideas on how to build her without breaking the bank: Wilhelt, the Rotcleaver Innistrad: Midnight Hunt brought us the Undead Unleashed precon and, right out of the box, this deck plays pretty well
This is quite easily abusable with Treasure tokens especially, but it doesnt end there
Absent much self-mill in Theros: Beyond Death, this will likely be how Escape plays out in Limited (especially in red and white)
Hashep Oasis Hashep Oasis, like the deserts before it, can tap for colored mana untapped and comes with an activated ability if you feel like sacrificing it
Similarly, print lines, those faint horizontal or vertical streaks on holofoil surfaces, are common and usually dont lower the cards value too much
