Surge Engine is a mythic Artifact Creature — Construct card from The Brothers' War (BRO), collector number 81. Current market price: $0.44 (foil $1.06), TCGplayer market prices via Scryfall.
Defender {U}: This creature loses defender and gains "This creature can't be blocked." {2}{U}: This creature becomes blue and has base power and toughness 5/4. Activate only if this creature doesn't have defender. {4}{U}{U}: Draw three cards. Activate only if this creature is blue and only once.