PyroblastutilityBudget$8.47One-mana red interaction that answers blue spells and permanents very efficiently. It is narrower than Chaoslace, but occupies a similar cheap instant-speed utility slot.
Red Elemental BlastutilityBudget$29.99Very similar to Pyroblast as a cheap red instant that disrupts blue spells or permanents. It is a strong, format-staple alternative for low-cost interaction.
Vexing ShusherutilityBudget$11.07A red hybrid utility card that can force a spell through counter magic and interacts with spell targeting in a broader support role. It fills a similar niche of cheap, color-based interaction.
Kari Zev's ExpertiseutilityBudget$0.59A low-cost red spell that provides tempo by temporarily stealing a creature and enabling a follow-up play. Like Chaoslace, it is a niche red interactive spell with a unique color identity feel.
Blood MoonutilityBudget$8.90A classic red color-changing effect for lands that can drastically alter a game's color dynamics. It is not the same card type, but it shares the theme of changing color identity in red.
Magus of the MoonutilityBudget$4.89Creature version of Blood Moon that similarly changes land colors and disrupts multicolor mana bases. It is a functional cousin in red color-manipulation and denial.
Painter's ServantutilityBudget$67.46It changes the color of all cards and permanents, which is the closest broad color-changing effect in the game. Unlike Chaoslace it is colorless and asymmetrical in scope, but the functional overlap is strong.
AnarchyremovalBudget$1.45A red sorcery that destroys all white permanents, representing red's classic anti-color hate. It is not a color-setting effect, but it serves a similar niche of color-targeted interaction.