Elf master

Elf master gets a +1/+1 counter for each elf you control.
{b}{b}{b}: If its night, destroy target creature with a+1/+1 counter.
{w}{w}{w}: If its day, destroy target creature without a counter.
{u}{u}{u}: If you are near water draw a card.
{g}{g}{g}: If you are near a forest gain 2 life