The spell doesn't allow for disbelief saving throws. The only way to make an image disappear is to hit it.
Frosty charges to 55N85E and hits an image! (Rolled 10+2 for charge = 12) It disappears. Seven images left.
Round 28:
The images swing in unison, with their longswords only. Hits! (Rolled 17)
8 points of damage! Frosty drops with -6 hp.
Next up for NE: a tiefling (planetouched). (MM)
Frosty charges to 55N85E and hits an image! (Rolled 10+2 for charge = 12) It disappears. Seven images left.
Round 28:
The images swing in unison, with their longswords only. Hits! (Rolled 17)
8 points of damage! Frosty drops with -6 hp.
Next up for NE: a tiefling (planetouched). (MM)