Kyrn, Elemental Master

{w}{t}: Create an elemental with power and toughness equal to your life total
{u}{t}: Return target creature to its owners hand then create an elemental with power and toughness equal to cmc
{b}{t}: destroy target creature and create an elemental with power and toughness equal to its cmc
{r}{t}: create an elemental with power and toughness equal to damage done this turn
{g}{t}: create an elemental with power and toughness equal to the number of lands you control