Stegosaur, Wild lord of Dinos

Trample, Haste, Double strike.
If you have a swamp on the battlefield, all of your creatures gain trample and haste.
Stegosaur, Wild lord of Dinos' power and
toughness is equal to your devotion to green
and red combined.
If you have other Dinos on the battlefield, you
become the monarch.
Pay {1}{r/g}{r/g}: Regenerate Stegosaur, Wild lord of
Dinos.