def effect121(model, index, density, current):
"""
est_effect_21 <player filter> <delay> <model> <entity> <density> <current>
"""
if not isinstance(model, Model):
model = Model(model)
te = TempEntity('Fizz')
te.model = model
te.entity_index = index
te.density = density
te.current = current
return te
