However, it will most likely be put into its owner's graveyard because it has no defense counters (see below)
This is a Limited Edition Alpha -era mechanic, designed back when the game was still figuring out what counted as "simple," "intuitive," or "likely to cause a rules argument in a kitchen somewhere." The idea was flavorful enough: some Creatures were just too stubborn, too unnatural, or too deeply connected to the land to stay dead
Yes, it can get you the extra turn and generate the card advantage that can inevitably get you closer to a bonafide win condition, but it still can whiff, too, and many times just delays dying by a turn
Cards featuring Groot in Iron Man's armor, being watered by Storm-made rain, and sitting on Black Panther's shoulder were among them