Baulthus, Living Wall

Defender, trample
Whenever Baulthus, Living Wall enters the battlefield, you create a 1/1 human creature token,
and then you may pay {2}, and if you do, Baulthus,
Living Wall gets an indestructible counter.
Humans you control have indestructible as long as Baulthus, Living Wall is tapped.
{8}: Baulthus, Living Wall loses defender and gets
+1/+0 for every other wall you control.