MCU: 15 Most Powerful Items In Marvel's Phase 3
6. Gungnir
Gungnir is the the magical spear that comes as the biggest perk of sitting on the throne of Asgard, and it comes with its own power perks as well. It used to be the remote control for The Destroyer, of course but since that was destroyed in Thor, it's not a possibility any more.
But that was only part of the spear's power spectrum: it's also able to harness different energy types, not only plugging into the Odinpower, but also channelling dark power (as seen when Odin sent Thor to Earth despite the Bifrost being broken).
That is absolutely not to be underestimated, considering how devastating the bridge's fall was presented as.