Some anubias nana to go along with the Endlers
Anubias is a genus of aquatic and semi-aquatic flowering plants came from the same family of Cryptocorynes. This plant is native to tropical central and western Africa. They primarily grow in rivers and streams, but can also be found in marshes. It is one of the easiest Aquarium plants to grow...
Here you can see it growing on top of a small terracotta souvenir from Greece
It also does well in a petrified wood of different Size and Shapes... Up to you on how you train it to attach.
Remember this is an aquatic epiphytes and soil is not needed otherwise the stolons will rot.