Murasa Shrieker

Saddle up {3}{g} ({3}{g}: attach this creature to another target creature.)
Forestwalk
{1}{g}: Murasa Shrieker deals 1 damage to target creature or planeswalker.
Saddled up creature gets +2/+2, has forestwalk, and "{1}{g}: This creature deals 1 damage to target creature or planeswalker."