Was asked four times already, so,
horn is covered with hearts which are neutralizing Chryssy's power (reference to analogue Sombra's action from Crystal Empire episodes). It's work of Shining Armor and Cadence, they took part too.
YOU WILL BE ASSIMILATED
YOU WILL BEFRIEND THE PONE
I wonder if that counted when he slayed Vampires though...
I just imagined characters as they was introduced, without attention to their next destiny.