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They are and continue to be all the rage in Magic for sure
Given that Black Oath is infrequently played in cube the Priest seems a bit over indulgent although it probably still makes the top ten either directly behind Black Oath or pretty close to there
Palafin is easy to get hold of, as a Palafin ex box was released shortly after it came out, featuring the ex, regular Palafin, and its preevolution Finizen
This pairs well with Vampire Retainer, as the two can trigger both their effects with the use of the other
She offers us two abilities that are linked like Wilhelt: when a controlled creature dies, create a Clue-Token and use Surveil 1 when sacrificing a token