Liliana has enough life to absorb a lot of hits, and if you can ultimate, its pretty funny to see your opponent when theyre left with only one card of each type (usually a land and a creature)
Thatll give you some insight into where best to start and what to look for when you start picking up booster packs
If youve hauled a box of Commander decks, two trade binders, some decks in other formats, a water bottle, a draft kit, and whatever else is in your Magic bag around all day, imagine carting around what artists bring
LP copies can sell cheaply
For example, Korlash, Heir to Blackblade lets you discard another Korlash card to tutor two Swamps to the battlefield
Whenever another creature enters the battlefield under your control, you gain 1 life