Roar of the Dinosaur

Split Second (As long as this spell is on the stack,
players can't cast spells or activate abilities that
aren't mana abilities.)
Target creature becomes a green dinosaur in
addition to its other colors and types. It gains
trample, double strike, and +X/+X where X
is your devotion to green.
"What?!... A freaking dinosaur?!..." -- Light Yagami