Positioning affective agency as a site of investigation, this study documents how first-year writing students create multimodal antiracist campaigns to critically address the sociopolitical issue of racial justice and to collectively challenge the hegemonic violence of racial profiling. In describing students’ affective engagements with the multimodal campaigns, this study demonstrates the potential of multimodal writing pedagogies in enacting affective agency, weaving antiracist assemblages, and transforming affective relations, all of which will provide starting points for social change and antiracist action.