Restless Vents is a rare Land card from The Lost Caverns of Ixalan Promos (PLCI), collector number 284p. Current market price: $0.23 (foil $0.68), TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add {B} or {R}. {1}{B}{R}: Until end of turn, this land becomes a 2/3 black and red Insect creature with menace. It's still a land. Whenever this land attacks, you may discard a card. If you do, draw a card.