Black likes using the dead as a resource, and Zombies are a popular creature type
If you ever end up with multiples on the battlefield, the trigger puts a +1/+1 counter on each Wraith you control, so it gets out of hand immediately
Plus, running blue creatures specifically for sacrificing isnt the best strategy, since many blue creatures in competitive formats are value engines you want to stick to the board, or important combo pieces like Thassa's Oracle
This doesnt mean the cube is full of vanilla beaters and cards with only one line of text, but it does mean Im very cognizant of where Im spending my complexity points and avoiding cards with convoluted rules text
(It's a deck I made here - CasualNation #57 - The Equinaut Primer | Article by Abe Sargent (coolstuffinc.com)
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