At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. Then if that creature has toughness 6 or greater, transform Dormant Grove.
// Gnarled Grovestrider
Vigilance
Other creatures you control have vigilance.
Flavor:
As the natural cycle of day and night grew twisted, old powers stirred deep in the Ulvenwald.
//
Far from the bloodsoaked wedding, unseen by human eyes, a long-slumbering force arose to protect its home.