Varus, Master Dragon Rider

{g}{g}: Put a 2/2 green Elf creature token onto
the battlefield
{r}{r}: Put a 2/2 red Dragon creature token onto
the battlefield
{t}{6}: Sacrifice a 2/2 elf and a 2/2 dragon,
create a 4/4 Elvin Dragon Rider creature token
and put it onto the battlefield.
It gains Flying and Trample.