It uses a modified version of the Champion mechanic, requiring you to Behold a Goblin to cast it, which protects a key utility piece by exiling it until the Champion leaves the battlefield
FromTheShire: Dreadbore already sees somewhat fringe Modern play, and with plenty of ways to trigger descending like fetches etc this could certainly see a bit of play as well
If the top card of your library changes while you're casting a spell, playing a land, or activating an ability, you can't look at the new top card until you finish doing so
And while they dont offer the defined strengths of reds burn or greens big creatures, MTG colorless cards compensate with incredible versatility, making them indispensable for anyone looking for the highest-tier MTG cards to round out their deck
Core Set 2020 does not feature any new mechanics
Then, for each nonland card thats milled that way, they lose one life and remove a rad counter