From here, you can return an opposing nonland permanent to its owner's hand, then force your opponents to discard, which acts like a sneaky removal option against an empty-handed foe
Finally, while mana bases are always mid in precons, I did want to make one suggestion in Vault of the Archangel
II, III Each player returns two land cards from their graveyard to the battlefield
Contains 2 oversized foil cards, 2 playable foil cards, 34 game counters, and 4 booster packs of 12 additional game cards each.
Silumgar's Command is great with four separate options, three of which are card advantage, and fourth of which often is
In some cases, it's the creatures themselves, while other cards can stick them on your creatures