Luna's Sanity

{g/u} Put a Sanity counter on target creature an opponent controls.
{2}{g/u}{g/u}{t} Target opponent puts cards from the top of his/her library into his/her graveyard equal to the total toughness of creatures he/she controls with Sanity counters. Create a 2/2 black-green Thestral token creature with flying.
" You are just as sane as I am "
___Luna, the Dream-Witch