One-Eyed Giant Monster of Celtic Legends
Puzzle 1 of Celtic Mythology Hard Pack
Question is: One-Eyed Giant Monster of Celtic Legends
and the answer is: FACHAN
Word Meaning:
FACHAN — (folklore and now also fantasy) A giant in Irish and Scottish folklore, which has one central leg, one hand protruding from its chest, and one eye.
Definitions from Wiktionary.