Goliath, Stalwart Protector

Nightbound, Vigilance, Trample, Gliding (tap a
wall: this creature gets flying until end of turn), Protection from creatures with base power 2 or
less
When Goliath, Stalwart Protector enters the battlefield, it becomes night.
Whenever it becomes day, Goliath is an artifact creature with Defender that can't attack or block.