If you use Battle at the Bridge to kill the red dinosaur, it won't actually kill it before you gain the life from the spell
Any rule or effect that needs to determine the defending player in relation to a battle refers to that battle's protector rather than its controller
Primary: White White is the color that searches the library for enchantments
Now, sensing the return of the plane's greatest enemies, Greensleeves has been reborn as the Maro-Sorcerer of the Whispering Woods, a being of pure elemental power
Anytime another creature comes into play, you get to pick between adding three green mana, placing a +1/+1 counter on all creatures you control, or perhaps most importantly, scrying 2 and then drawing a card
The chance to upgrade into a late game Clone of sorts is nice, but much in the same vein as other one-drops with pricey active abilities a luxury, theoretical insurance against low-impact top-decks in the late game