The Markan Passion narrative alludes to Ps 22 (LXX Ps 21) in reverse, culminating with Jesus’ cry: ‘My God, my God, why have you forsaken me?’ (Mark 15.34; cf. Ps 22.1). I argue that this ‘extended inverted allusion’ was an admired literary technique. Through select examples of this technique in the writings of the Hebrew Bible and Greco-Roman literature, I demonstrate its various functions—it can be employed to reverse meaning, to dissociate causation or to create new narrative trajectories. Reading Mark 15 in light of the literary functions of inverted allusion reveals new interpretive possibilities. In the Septuagint, Psalm 21 suggests that the psalmist's suffering was merited because of transgressions, but the inverted allusions to this Psalm in Mark 15 reinforce that Jesus’ suffering is unmerited (cf. Mark 15.10, 14) by decoupling the suffering from the transgressions. Additionally, in LXX Ps 21, the psalmist moves from forsakenness on account of transgressions toward divine deliverance. By alluding to this Psalm in reverse, Jesus travels the psalmist's journey in reverse. Rather than move from forsakenness toward divine deliverance, Mark's Jesus moves toward forsakenness, precisely to bring about divine deliverance.