Chroma Conclave

When Croma Conclave enters battlefield, opponent looses 2 land
{7}{s} All target Creatures get -5/-5
{7}{w} Take two land cards from opponent
{7}{u} Give all friendly creatures +3/+3
{9}{b}Kill 3 target creatures
{7}{r} Opponent puts 15 cards from deck into their Graveyard
{8}{g} All target Creatures that are {g} are put into your hand