What Is The Rare Ingredient Droprate?

I have been working on leveling woodworking and for that I need wood (Obviously) so I am currently at the light wood and I have seen 5 scared unicorns in the light forest, killed all of them and only gotten 1 unicorn horn. Is that normal or am I just unlucky?

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Just killed my 6th and nothing

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#7 no horn :/

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Just killed my 8th and finally got another :)

 

Unknown. Rare mobs have their drop rates edited, and you'd have to farm a very large amount to get accurate data. Normally drop rate is 15% for t0 ingredients, 5% for t1, .5% for t2, .05% for t3, but rare mobs who knows