Wall of the South

Defender.
Wall of the South enters the battlefield with X
+1/+1 counters.
At the beginning of your upkeep, you may place
a +1/+1 counter on Wall of the South.
If damage would be dealt to Wall of the South,
prevent that damage and remove that many
+1/+1 counters.
Creatures can't attack you unless their controller
pays X for each attacking creature where X is the
number of fortifications you control.