You can't venture into the Undercity anew with any creatures that use the "venture" mechanic, but if you're already in the Undercity a venture creature will progress to the next room of the dungeon
Specifically, this card features an exclusive Koraidon
It gives indestructible if the creature is green, flying if its white, and +1/+1 for each colormaking it a perfect fit for hybrid decks
Numot, the Devastator Numot, the Devastator made my list of Saltiest Commanders, to some rather controversially
For instance, you can distribute +1/+1 counters to an opponent whose board was just wiped
More information on the new battle card type coming to Magic: The Gathering in March of the Machine was revealed in a Wizards of the Coast (WotC) email yesterday