Bigby's True strike

You point a finger at a target in range. Your magic grants you a brief insight into the target's defenses. Until. the end of your next turn, you gain advantage on all of your attack rolls against the target, provided that this spell hasn't ended.  All creatures under your control (eg Animate dead, Conjure Elemental and Dominate person) and charmed creatures also get advantage against that creature for the duration.  All attacks it makes against you are at disadvantage for the duration.