Grover, The Wild

All creature you control receive 1 less from all
sources of damage.
{g}{g}{g}{t}: Until end of turn, all creatures you
control receive an additional -1 from all sources
of damage.
{g}{g}{g}{g}{g}{t}: Until end of turn, all creatures
you control receive an additional -2 from all
sources of damage and Grover can not be
targeted by instant and sorcery spells.