Revelation 20:1

Καὶ εἶδον ἄγγελον καταβαίνοντα ἐκ τοῦ οὐρανοῦ, ἔχοντα τὴν κλεῖν τῆς ἀβύσσου, καὶ ἅλυσιν μεγάλην ἐπὶ τὴν χεῖρα αὐτοῦ.

RBT Greek Interlinear:

Strongs 2532; Kai; Καὶ; And; Conj

Strongs 3708; eidon; εἶδον; I/they perceived; V-AIA-1S

Strongs 32; angelon; ἄγγελον; angel; N-AMS

Strongs 2597; katabainonta; καταβαίνοντα; he who is climbing down; V-PPA-AMS

Strongs 1537; ek; ἐκ; from out; Prep

Strongs 3588; tou; τοῦ; the; Art-GMS

Strongs 3772; ouranou; οὐρανοῦ; heaven; N-GMS

Strongs 2192; echonta; ἔχοντα; he who is holding; V-PPA-AMS

Strongs 3588; tēn; τὴν; the; Art-AFS

Strongs 2807; klein; κλεῖν; key; N-AFS

Strongs 3588; tēs; τῆς; the; Art-GFS

Strongs 12; abyssou; ἀβύσσου; Abyss; N-GFS

Strongs 2532; kai; καὶ; and; Conj

Strongs 254; halysin; ἅλυσιν; a chain; N-AFS

Strongs 3173; megalēn; μεγάλην; mega; Adj-AFS

Strongs 1909; epi; ἐπὶ; upon; Prep

Strongs 3588; tēn; τὴν; the; Art-AFS

Strongs 5495; cheira; χεῖρα; hand; N-AFS

Strongs 846; autou; αὐτοῦ; himself; PPro-GM3S

RBT Translation:

And I perceived an angel, he who is climbing down from out of the Heavenly one, he who is holding the Key of the Abyss and a mega chain upon the Hand of himself.

Mega Chain on the Hand of himself

LITV Translation:
And I saw an angel coming down out of Heaven, having the key of the abyss, and a great chain on his hand.

ESV Translation:
Then I saw an angel coming down from heaven, holding in his hand the key to the bottomless pit and a great chain.