If you only care about non-Standard Constructed formats (like Timeless or Historic) and dislike drafting, then no the Mastery Pass probably isnt a good idea because it rewards Standard packs (which you don't have much use for) and a Draft token (which you don't enjoy playing)
I find that this is a good technique to push it to produce output thats easy to parse
We Buy Sealed TCG Products We purchase vintage and modern sealed TCG products including booster boxes, booster packs, UPCs, ETBs and special sets
Contaminated Drink will hit the spot, just ignore that bug on the wall and the rad counters oh wait, those are the ones that mill you
eBay: A go-to for auctions and bargains, eBay allows you to find rare and vintage cards
1 Land Non-Basic Cave 70% of the time Core full-art basic land 30% of the time 1 Token, ad card, or a card from The List The Lost Caverns of Ixalan Collector Boosters 4 Traditional foil commons Can be one of 108 Commons from The Lost Caverns of Ixalan main set