Spinosaurus

Haste
Once per turn, you may pay half your life total
to double Spinosaurus power until the end of
the turn.
Whenever Spinosaurus attacks double the power
of another target Dinosaur creature you control
until the end of the turn.
"And finally, why should I let you roam this earth
if I can unleash the primal power of an apex predator?"
-Seth, Time-Traveling Genius