Void Tunnel Connector

When Void Tunnel Connector enters the battlefield, planeswalk.
Whenever you planeswalk, reveal a card you own
from outside the game that comes from a set that occurred on your current active plane. Put that
card into your hand.
"With these, we can match the phyrexians in their
plane hopping and prove assistance to any plane in
trouble." - Lennier, Invasion Prepper