Thanos vs Magolor

Thanos vs Magolor is a What-if Death Battle created by Eficiente featuring Thanos from Marvel Comics and Magolor from Kirby.

Description
Marvel vs Kirby! Which of these (similarities, similarities, similarities) would win in a Death Battle?

(I'm working on another project so this one is going to take some time)

Round One: Base Thanos vs Base Magolor

Round Two: Thanos with the Cosmic Cube vs Magolor with the Master Crown

Round Three: Thanos with the Infinity Gauntlet vs Magolor with the Master Crown

Include a round with Thanos with the Heart of the Universe is unnecessary, Thanos would simply win that. Absorption immunity is not a thing.

Interlude
(Cue - Theme From DEATH BATTLE!)

Who will Win the first round? Thanos Magolor Probably Thanos Probably Magolor I don't know

Who will Win the second round? Thanos Magolor Probably Thanos Probably Magolor I don't know

Who will Win the third round? Thanos Magolor Probably Thanos Probably Magolor I don't know

Who do you want to Win? The Mad Titan Magolor probably has a better with Mistress Death

Intermission
(Cue - Theme From DEATH BATTLE!)

Wiz: All right the combatants are set let's end this debate once and for all.

Boomstick: It's time for a Death Battle!