Rek'Sai, The Terror Beneath

Devoid (This card has no color.)
Whenever Rek'Sai, the Terror Beneath attacks, if
the defending player and the controller of
Rek'Sai both control a tunnel land she cannot be blocked.
{c}{r}{r}{t}: Target player gets a Land token called
Tunnel with "This land enters the battlefield
tapped and does not untap."