It's pretty clearly a deliberate joke, because Wizards of the Coast virtually never gives reminders for basic evergreen abilities like vigilance or haste
If you know me, you know Im a pretty big fan of Blue creatures with bounce or tap down effects, and this is a distinctly D & D version of it, but it seems pretty good to me
I'd jam both in any Aura deck that can run them, and together they just win the game
Two big things going on are the introduction of Junk tokens and rad counters
Decks that are populating particularly like this kind of effect, and while 6 mana is a lot, the modes can have a major impact in different ways youll find relevant in many Commander games
It will be interesting to see what happens once the card is opened