First, the art is amazing
The only reason Zulaport Cutthroat beat out Blood Artist is that it is a 1/1 rather than a 0/1, and has three creature types that can all work well in black Commander decks, over Blood Artist's lone Vampire typing
It isnt a direct replacement for Phyrexian Altar, but it is a neat little backup with its own set of advantages and disadvantages
At the beginning of your upkeep, look at the top card of your library
However, Urzas Saga provided its own spin on this rare subgroup of cards with a 0/1 creature that cant be targeted by spells or abilities (from any player, even its owner) due to containing the increasingly hard-to-find shroud keyword
This ray pattern can come in rainbow or silver foil, and the rays can vary in shape and style I'm shamelessly going to use the same phrasing that The "full rays" pattern has full, unbroken rays, directly touching the Pokmon