Descent of the Dragons

You shake your staff of dragons in a ritual. A number of Adult Red Dragons equal to the level this spell was cast at descend from the sky from behind a cloud or mountain 2000ft in the sky. They rapidly approach at the speed of 500ft per round at your command and snatch up your enemies as sacrifices. They will do no other task you command and fly away into the sky after taking the sacrifices. All enemies are affected by the dragons frightful presence, which does not stack. A creature who is about to be snatched by the dragons must succeed on a dexterity saving throw or be captured. The dragon swoops back around on each of their turns if they fail to grab an enemy. At the start of each of a captured creatures turns, they may make a DC23+the amount of rounds they've been held strength check to escape the dragon, and are incapacitated until they escape. They still take fall damage if they escape. If a dragons sacrifice escapes, they go back to get another one. After a dragon grabs an enemy, they fly up until they reach 2000 ft at maximum speed(80ft) and both them and the creature disappear from this plane to the dragons homeplane of Grixis, presumably to be devoured.

As a Warlock. If you cast this spell as a warlock, your patron might see it as betrayal to another patron, unless they are also a dragon.