Hans Urs von Balthasar's kenotic trinitarianism and theodramatic Christology is designed to dramatise the triune God's kenotic engagement with the world without introducing a change in God. It continues to be disputed whether Balthasar ends up divinising suffering and making God into a tragic deity or succeeds in redefining and complexifying divine immutability. To engage with this question, this article critically examines Balthasar's theological use of the image of ‘the Lamb slain before the foundation of the world’, which plays a pivotal role in his kenotic and theodramatic soteriology. I will argue that his kenosis-driven understanding of John's Gospel is untenable, and his rich theological use of Revelation's image of the Lamb slain, intensified by his questionable exegesis of the Fourth Gospel, renders super-temporal suffering and death real in the life of God.