If at first you don’t succeed…
In Doctor Strange #384 by writer Donny Cates and artist Gabriel Hernandez Walta, Doctor Strange got a pair of considerable power boosts.
Warning: full spoilers ahead!
Previously, Doctor Strange lost the mantle of Sorcerer Supreme to Loki. In an effort to get it back, he went on a quest to Asgard where the World Tree gave him what he would need to beat Loki: a branch of Yggdrasil charged with magic. Upon using it, he got a massive power boost and an Asgardian makeover.
It has been established that using magic always comes at a cost, and Loki points out that Doctor Strange isn’t strong enough to “pay” to use Yggdrasil. He’s right, and we see that Doctor Strange’s workaround is magically funneling the cost to a recently returned Sentry, who is essentially Marvel’s Superman and has incredible endurance.
Doctor Strange and Loki battle it out, with Doctor Strange taking the upper hand, only for his former assistant Zelma to break up the fight with a spell that cancels all magic for three minutes. Her goal was to make it so they would talk things out like adults, but even though Doctor Strange is now a normal human, Loki still has the strength of a god. Loki delivers a brutal punch to Doctor Strange and uses his advantage to force him to open up a locked chamber inside the Sanctum Sanctorum. This backfires on Loki when it is revealed that the chamber was actually a prison for the Void, the dark opposite of the Sentry with equally devastating power. The Void bonds with Doctor Strange, giving him another considerable power boost.
However, while the Void might have the power to beat Loki, Doctor Strange likely won’t be able to control for long, if at all, because the Void is an obscenely powerful evil entity. To solve this problem, the returned Sentry might have to step in, sacrificing his well-being to once again keep the Void at bay.