Vigilance When Casal enters, search your library for a Forest card, put it onto the battlefield tapped, then shuffle. Whenever Casal attacks, you may pay {1}{G}. If you do, transform her.
3/3

Vigilance, trample When this creature transforms into Casal, Pathbreaker Owlbear, other legendary creatures you control get +2/+2 and gain trample until end of turn. At the beginning of your upkeep, transform Casal.
6/6