Brooklyn, Storyteller

Vigilance, Trample
Whenever you cast a creature spell, distribute a number of +1/+1 counters equal to its mana value among creatures you control.

Creatures you control with +1/+1 counters have "Whenever this creature deals combat damage
to a player, create that many 1/1 green and white Spirit creature tokens."

"The echoes of her melodies manifest as guardians of the living world."