Arkados, god of the planes

Indestructible. This card can't be exiled.
X must be equal or greater than the number of
lands you controlled when Arkados, god of the
planes entered the battlefield.
Arkados, god of the planes's power and toughness
are both equal to the number of lands you control.
{x} Proliferate X times, then put a land from you
hand onto the battlefield.