The Marvel Cinematic Universe includes many branching timelines and alternate realities where variants of the same person can exist simultaneously. Loki exemplifies this by functioning as multiple concurrent versions with different moral orientations. Time travel allows deliberate synchronization of variants so several temporal copies can converge to overwhelm an opponent. Such multiplicative tactics create causal complications: future versions can inform past versions, altering knowledge states, and temporal duplicates can settle or repeatedly create armies across eras. The ontology of time travel diverges across fiction: some narratives permit changes to the past, while others enforce consistency so that travelers always enact events that already occurred.
Since the metaphysics of the MCU includes time travel, this entails that the same person can be at different places at the same time. They can even fight, as happened with Captain America. While this is a metaphysical mess, this means time travel can be used as a multiplier: a person can time it so different versions of themselves arrive at the same place at the same time.
So, for example, Loki could show up to fight an enemy at a set time and arrange for himself to go back or forwards in time ten times and end up with eleven of himself to overwhelm the foe. This, of course, leads to the usual paradoxes and problems of time travel. A future Loki could tell a distant past Loki about things that a middle past Loki did not know, but then the middle past Loki would know it.
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