Magic is complicated. I looked at doing something like this but the open-ended nature where one specific card will completely change the rules or require a series of followup events or modifications to the rules engine at hand is just tremendous.

or, that certain cards when play together make an infinite loop, and so cannot be played/insta-die

I was wondering how complicated it could really be, and it turns out that some people showed in 2019 that it's Turing-complete -- meaning that any conceivable computation can be simulated by a MTG game, indeed a game in which every move by every player is forced: https://arxiv.org/abs/1904.09828

IOW, it's as complicated as possible.