Contested War Zone is a rare Land card from Edge of Eternities: Stellar Sights (EOS), collector number 53. Current market price: $1.26 (foil $1.87), TCGplayer market prices via Scryfall.
Whenever a creature deals combat damage to you, that creature's controller gains control of this land. {T}: Add {C}. {1}, {T}: Attacking creatures get +1/+0 until end of turn.