it just so happens that there arent many strong cephalids
Convoke lets you tap creatures for mana, and populate creates token copies
Raging River Year : 1993 Expansion : Unlimited Heres another utterly confusing card from one of the earliest Magic expansions
Kids, its a simple as this: Green decks are great at making mana with Llanowar Elves, Incubation Druid, and explore creatures, and Hydroid Krasis is great at using excess mana
Even removing Nether Void is going to cost someone an additional three mana, so you're getting some value here no matter what
There are many other cards that are tagged on as forest art on sites like Scryfall if the art depicts trees or forests, like the Fallout Farkseek reprint, but those are outside of our scope today