Sovereign of Leival's Bloom

Sovereign of Leival's Bloom's power and toughness are each equal to the number of Forests on the battlefield.
Sovereign of Leival's Bloom gets -1/-1 for each Swamp on the battlefield.
Sovereign of Leival's Bloom has flying as long as you control a white permanent.
"Fly!? On that thing!?" - Jonte, Lost Warden