Ever since Wong revealed at the end of Doctor Strange that the Eye of Agamotto was an Infinity Stone, we’ve known that Strange would be a target for Thanos and his goons, and assuming the EB MAW tag does indeed mean Ebony Maw, he’s the one the Mad Titan will send to attack the sorcerer.
In the comics, Ebony Maw’s main ability is being able to persuade others to do his bidding just by speaking.
Of course, until Marvel officially confirms who will be serving Thanos in Avengers: Infinity War, all we can say for certain right now is that Strange’s magical powers aren’t helping him fend off this adversary.
Ebony Maw isn’t someone you send in for a battle of fisticuffs, but with his persuasive power, he could compel Strange to not resist as he takes the Time Stone from around his neck.