Ambushing Flamefiend

Skulk (This creature can't be blocked by creatures with greater power.)
{1}: Until end of turn, Ambushing Flamefiend gets -1/-0 and gains of your choice first strike, trample or "{r}: Ambushing Flamefiend gets +1/+0 until end of turn."
The smell of burning wood and hollow howling in the dense fog makes every brave heart fall into pieces.