Druids most famous abilities in D&D involve the world of animals: wild shape allows them to transform into any beast, while their animal companion is the best four-legged friend any pet-lover could dream of
plus, you need to pay the cost of at least one of the creatures you are tutoring up
Although Primeval Titan does cost quite a bit of mana, Green allowed it to be played very early
Specifically, the Rakdos and Golgari builds use Archfiend of the Dross, another giant flying demon, while the monocolor decks play the more black mana intensive Bloodletter of Aclazotz, which also makes the drain effect more damaging
Reanimation also helps get value from discarded cards, along with the normal graveyard-filling that happens naturally
So, even with a small random, you will still find the cards you need inside each edition