You should obviously target it first, but then they can sacrifice some things to grow it, then sacrifice itself to stack a bunch of counters on something else
(Then planeswalk away from this phenomenon.) Gifts of the Gods Phenomenon When you encounter Gifts of the Gods, each player gains 5 life, then shuffles their graveyard into their library
However, you can honestly do just fine picking a handful of different Elves and good removal
This added, and somewhat unnecessary randomness, is what stops this card from being higher on the list, but all other abilities are extremely useful, and we can see this card being a staple in mono-red aggro decks and perhaps some more aggressive Izzet decks too
Theyre very popular as a result, because everyone is at the mercy of Lady Luck, instead of having the advantage of an expensive deck