Oh Wow There's Some Dinosaurs

At the beginning of each upkeep, the player whose turn it is sacrifices a non-Dinosaur creature and puts a +1/+1 counter on each dinosaur they control.
{3}{g}: Put a 4/4 green Dinosaur creature token onto the battlefield.
{7}: Put a 4/4 green dinosaur creature token into play under you control, any player may activate this ability.