You can give all your artifact creatures and vehicles a +1/+1 counter each turn, and then turn those counters into card draw after combat
It was one of Standards best cards throughout its run in the format, got nerfed for Alchemy, and even inspired a combo deck based around repeatedly targeting it with spells
Most of the "unbeatable" openers in unpowered cube come from Vault and Monolith but they do require very tailored decks to appropriately use the power they offer
Result: 2 legendaries (Queen, Sid Phillips) and 2 epics a strong hit rate for only 6 packs, though the sample is too small to draw reliable conclusions
Once in play, her presence turns every other ninja into a card-drawing, damage-dealing machine
When it ETBs you get a free scry 2 for card selection, which you are in the color to flicker