This black sorcery is okay early in the game, recovering you some life, and it really shines when you have mana to spare or cards like Vito, Thorn of the Dusk Rose
The unique Necron flavor makes even formerly benign artifacts such as Caged Sun feel quite sinister and I think that Warhammer 40,000 fans will see that a lot of thought went into the reflavoring behind these reprints
Given that the eventual payoff is potentially a lot of free cards, that sounds good in any blue deck
I checked YGOrganization and their translation of the card when it was first revealed in the OCG reads: You can only activate 1 of this cards name per turn
In a deck that can investigate during your own turn and your opponents turns, that adds up incredibly quickly
Graded Population Report: Kabutops #25 Visualize the distrbution of grades in the chart