Where Ooze really has the potential to shine is with blink shenanigans, as it blinks far better than Skyclave Apparition does
A third reason is play testing
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Virtue of Loyalty is good when you have enough creatures to pump them, but its also a cheap 2/2 flash knight creature, and so on
But XY is past, and in this go-around, we have zero capital letters in the "ex", so, do we have to explain the meaning to all, and find it too complex to understand in the eyes of some who weren't here when XY was, or can we interpret this go-around as a different way to Mega evolve, TCG-style, and remake mega turbo under a different name, and leave the past alone as "different", just like NVI's Eelektrik compared to BLK's Eelektrik