Frankly, its an obscenely powerful card
Watermark: Set Symbol Illustrated by Daarken Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
We have Bazaar, mana, a draw spell, a reanimation spell, and a creature to reanimate
So far in 2020, we've been averaging about one per month (and if you go back to the initial release in December, we've actually had 13 individual drops in three months, making the average closer to four drops per month since the series was announced), although the average is somewhat complicated by how you count themes that come with multiple drops, like the original Theros Gods during Worlds in February (technically, the Gods were five individual but related drops, although there is an argument for counting them as one big drop since buying all of the drops together was an option)
Legends like Graaz, Unstoppable Juggernaut who turns all your creatures into 5/3 Juggernauts, or the new variant of everyones favorite Phyrexian Angel, Atraxa, Grand Unifier, which gives us a Niv-Mizzet Reborn effect that looks at cards types instead of colors