At the beginning of each upkeep, if no spells were cast last turn, transform this creature.
"With this ritual, we cast aside our fragile humanity . . ."
Illustrated by Dan Murayama Scott · Innistrad · #208
2011-09-22
You can regenerate Ulvenwald Primordials in response to the triggered ability that would transform it. If you do, the regeneration shield will apply to Ulvenwald Mystics that turn.