strength in numbers

as you cast strength in numbers, create 3 1/1
white human soldier creature tokens.
convoke(Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or {1} mana of that creature's color.)
creatures you control have +x/+x
whenever you tap a creature you control
to play a spell with convoke it taps for
two mana any combinatio of
white and green instead