Giara, the spider whisperer

When Giara enters the battlefield, Destroy all
lands, then search your library for up to 5 spiders
and put them onto the battlefield tapped.
{b/g}: destroy target creature.
{b}{b}{b}{g}{g}{g}, sacrifice a spider: return target
non-spider creature from a graveyard to the battlefield, except it, is a black green zombie
spider, with reach.
{b/g}{b/g}:destroy target creature.
{p/b}{p/b}{p/g}:destroy target creature.