Not only does Tataru reward you and an opponent with card draw, but she can create a fairly steady stream of Treasure tokens
The 8 mana is dropped by your basic land count, so in a four or five color brew with those lands out you should be able to get back a 4/3 with reach and trample for 3 or 4 mana, pretty cheap, and that scales up quite ably
That's okay on its own, but if you have Sheoldred on the battlefield, suddenly your opponent will lose an extra six life
From what I have seen this card has no real place in an aggressive deck
While this doesn't really matter much for Modern Horizons 2 specificallythe rest of the set is strong enough that boxes offer good value, and The List is just a random bonus lottery ticketit is going to matter in the near future, once Wizards starts using "The List" as its primary reprinting spot for unique Secret Lair cards
Heres a table with these presumptions, and the two possible distributions