Alchemy: Murders at Karlov Manor · #15
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When Construction Arsonist enters, you may choose an instant or sorcery card in your hand. If you do, that card perpetually incorporates {R} and gains "When you cast this spell, it deals 2 damage to each opponent." Whenever you cast a multicolored spell, Construction Arsonist gets +1/+1 until end of turn for each of that spell's colors.
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Construction Arsonist (YMKM-15) is a 2/2 Goblin Rogue Wizard creature from the Alchemy: Murders at Karlov Manor set. When it enters the battlefield you may attach an added {R} and a triggered damage clause to an instant or sorcery in your hand, and it gains a combat boost whenever you cast multicolored spells. Its enters-and-multicolor-synergy positions it as a red spell-support creature that can both modify spells and grow as you play multicolored cards.
Catalog pricing data as of 17 Apr 2026, 00:06
