Featherwalk Tar Pit

Featherwalk Tar Pit enters the battlefield tapped.
Whenever Featherwalk Tar Pit enters the battlefield, sacrifice it unless you control a Maze permanent.
Whenever an opponent casts their third
noncreature spell each turn, exile that spell under
this land after it resolves. Then exile each other
spell exiled this way under this land.
{t}: Cast a copy of the exiled spell without paying
its mana cost.