Illusionist's Barrier

Reified 4 (This card can be attacked as though it were a planeswalker. If it is dealt 4 or more damage in one turn, it is destroyed.)
Creatures can't attack you or planeswalkers you control unless their controller pays {2} for each creature they control that's attacking you or a planeswalker you control.
"If you possessed the mental capacity to stop and think, you'd see that none of this is real."