Beautifly

You may sacrifice a creature named Silcoon rather than pay this spells mana cost.
Flying.
{2}, {t}: Target player's creatures get -X/-X until
end of turn, where X is half of Beautifly's
toughness rounded down.
{t}, Exert Beautifly: Search your library for two
land cards and put them onto the battlefield
tapped. Then shuffle your library.
(An exerted creature won't untap during
your next untap step.)