Ramping is the first thing that comes to mind when looking at this card. Dryad of the Ilysian Grove could also work amazingly well with Scapeshift and Dread Presence for some devastating combos.
On the other hand, this card is more likely to see play alongside Hydroid Krasis and the new Uro creature. That's where Dryad of the Ilysian Grove will truly shine.
Of course, it works a lot better in Modern with cards like Valakut, but Pioneer players will find many good ways to utilize this excellent card, too.