Varris, Nature's Bard

Double strike, haste, reach
Whenever a creature you control blocks, target creature you do not control gers -x/-0 until end of turn where x is Varris' toughness (use this ability only during an opponent's turn, and only once a turn).
{x}{x}{g}{w}: Varris, Nature's Bard gains deathtouch and gains +x/+x until end of turn.