Polymorph sees a similar pattern
Number 25 Language English Not Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pauper, Pioneer, Standard, Timeless, Vintage
Since the beginning of Magic, it has remained consistent that you can only tap untapped permanents and untap tapped ones
Make every game night a showcase of style and quality
Although there are many ways to put -1/-1 counters on creatures, Im considering only MTG cards that put -1/-1 counters on creatures (or on themselves) via their own card text
If one of the creatures is an illegal target and the other one isn't as The Earth Crystal's last ability tries to resolve, the original distribution of counters applies and the counter that would have been put on the illegal target is lost