Fangs of Kalonia says: “Reinforce each creature you control. Then reinforce each creature you control x times”
With cards with the text “Do something when creature is reinforced”, Fangs spell counts one time for the first reinforce and only one other time for the “x reinforces” and must count x times. So 1 time for the first part of the Fangs’ text and if x=4, another 4 times for example, not 1.
HEAT SHIMMER spell has similar problem