μυθιήτης
From LSJ
εἰργάζοντο λογάδην φέροντες λίθους καὶ ξυνετίθεσαν ὡς ἕκαστόν τι ξυμβαίνοι → they went to work bringing the stones as they picked them out and put them together as each one happened to fit
English (LSJ)
ου, ὁ, in pl.,
A = στασιασταί, στασιῶται, Anacr.16 (cf. μυθητῆρες, μύθαρχοι, μῦθος 111); in sg., οὐ μ., οὐ δικασπόλος κεῖνος (sc. Νίνος) Phoen.1.7.