All the cards in the cube are custom uploaded from the weekly mtg.design challenges. The names of the cards on Cube cobra are not the actual names of the cards. (For example walk the plank is actually Nible Squirrel)

themes(in progress, likely to change)
GBW Squirrels
WRU Energy

https://mtg.design/themes (top picks by ancestral and others)
https://mtg.design/energy
https://mtg.design/squirrel
https://mtg.design/assist
https://mtg.design/headwear