I'm not 100% sure where it came from, but I have to assume it was designed top-down from the creative side
Removing a creature is pretty potent, so the design team decided to make it a one-time thing and turned it into an enters-the-battlefield trigger
However, today its largely forgotten, making this one of the most obscure references in MTGs TMNT set
restricting the spells your opponents can cast and the creatures they block with is unique
Disappear At the beginning of your end step, if a permanent left the battlefield under your control this turn, put three +1/+1 counters on up to one other target artifact or creature
These decks (and their Jeskai corollaries) are sometimes reported under the name "Flash," and that's probably an apt description of their play pattern