The Gatewatch Alliance

If you control a Gideon, Jace, Liliana, Chandra,
Nissa, Ajani and Teferi planeswalker you win the
game.
Whenever a planeswalker you control activates a loyalty ability you get {e}
Pay 8 {e}: Search your library for a planeswalker
and put it in your hand; then shuffle your library