Planeswalkers I'm currently looking for include:

Dack Fayden
Elspeth, Knight-Errant
Jace Beleren
Liliana Vess
Nicol Bolas, Planeswalker
Ral Zarek
Sorin Markov
Tamiyo
Tezzeret the Seeker

Keranos is the only god I'm currently not looking for.