The Red Horns flinched, anticipating the pain that was about to follow, but kept his wits about him. A shield of pure force manifested just in time to deflect the fearsome teeth.
Then the beast was past and he could focus on returning the favor with is own assault, slinging the Yklwa at the Quetzacouatl in quick pursuit
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(1d20)[20]+8, damage (1d8)[2]+6, if crit (1d8)[7]
With a very satisfying crunch, the short spearlike weapon hit true, ripping a deep gash into the strong back muscles of the flying dinosaur.