I feel like this would be really good in certain aggro decks, since you can just endlessly spam little creatures and build up its time counters
MTG Spark is a series of spells that were created with Planeswalkers Loyalty Counters in mind
Zetalpa is the kind of card a new player looks at and is mind-blown by how could something with this many words ever lose
Mazes End Winning with lands is the puzzle Maze's End sets before you
As for our mechanical friends that introduce Prototype with The Brothers War, there are 18 in total (four mythics, three rares, six uncommons, and four commons) and appear in all five colors, so youve got your pick of options
Academy Ruins, Hall of Heliod's Generosity, and Volrath's Stronghold all save your vital permanent cards from exile and set them up for the following turn