Will it survive long term despite being terrestrial?It's very likely "Mondo grass" - Ophiopogon japonicus, a terrestrial plant often sold as an aquatic. The grooved leaves and heavy root structure is pretty distinctive. I've seen the green, dwarf and "black" versions sold in pet stores.
I posted videos of this tank, but not updated i will soon make one showing the whole thing with the new plants and plant growth. they are in my youtube channel i created for this forum and family around the world.It looks really nice- like it is doing well.