If is to use tweens only and no extra nodes, can be done tweening rect/scale
and rect/pos
in the same tween.
Dirty example:
tween.interpolate_property(text, "rect/scale", text.get_scale(), text.get_scale()*4, 2, Tween.TRANS_LINEAR, Tween.EASE_IN)
tween.interpolate_property(text, "rect/pos", text.get_pos(), text.get_pos()-text.get_size()*1.5, 2, Tween.TRANS_LINEAR, Tween.EASE_IN)
tween.start()