Liriae, Orazca Bound

Denfender, reach
Other creatures you control have "This creature doesn't untap at your next untap step."
At the beginning of your end step, if no one has cast a spell since your last turn, transform Liriae.
"When I settled in the valley, I had no idea that these majestic creatures migrate to this location. Still haven't seen one yet." - Azor