Horta, Nurturing Pack Leader

Convoke (Your creatures can help cast this spell.
Each creature you tap while casting this spell
pays for 1 or one mana of that creature's color.)
Dogs and Wolves you control get +1/+1 and have vigilance.
{g}{w}{g/w}{g/w}:Horta, Nurturing Pack Leader gets
+X/+X and trample until end of turn, where X
is the number of Wolves you control plus the
number of Dogs you control.