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In the Binding of Isaac expansion Wrath of the Lamb, I got a trinket called Undefined, which looks like the severed head of a green fish. What does this trinket do?

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possible duplicate of Which Trinkets are available in Wrath of the Lamb? – Drake May 31 '12 at 12:24
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According to the wiki, this is the Fish Head trinket and its effect is to spawn attack flies when Isaac is hit.

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The description on the wiki is inconsistent: it tells it spawns flies when Isaac gets hit, as the Mulligan; the Mulligan description though says that it spawns flies when firing. – Kappei May 30 '12 at 14:17
I know, but I assumed their description of the effect was more likely to be accurate than their comparison to another item. If I find out that's not the case, I can change it. – murgatroid99 May 30 '12 at 14:19
@Kappei by the way, the description in the wiki is now consistent (and my assumption was correct) – murgatroid99 May 31 '12 at 13:06

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