Amethyst isn't in range when Frost lets his shards of cursed ice fly, but Steven is, and he's too distracted and too weak to summon his shield. She doesn't think about what she's doing, just bounds towards him to put herself between his body and the projectile.

The ice strikes her gem, and she lands on the ground, flickering.

"--nevets-S--"

She really needs to know that he's OK, but the gem damage is making her attempts to speak come out backwards.