At face value, its a 2/3 deathtouch creature with a tempt trigger on top, which is extremely powerful on its own, creating an attacking Ring-bearer and acting as a deathtouch blocker
You now have three colourless mana floating, and can do it again: tap Basalt Monolith to make three more colourless mana, pay three to untap it, copy the ability using two colourless and Rings of Brighthearth, untap Basalt Monolith once, tap it to make three more colourless, and then untap it with the copied ability
Necron Deathmark Regardless of whether you think Cemetery Desecrator or Noxious Gearhulk is better, Im confident that Necron Deathmark is an upgrade over either
-2: Sacrifice a creature
More Expensive Monkeys and Apes Higher up the mana curve, the all-stars are the legendary Apes
We say yes, undoubtedly