Littjara Mirrorlake is a uncommon Land card from Kaldheim (KHM), collector number 264. Current market price: $0.25 (foil $0.36), TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add {U}. {2}{G}{G}{U}, {T}, Sacrifice this land: Create a token that's a copy of target creature you control, except it enters with an additional +1/+1 counter on it. Activate only as a sorcery.