Conclave Equenaut is a common Creature — Human Soldier card from Duel Decks: Elspeth vs. Tezzeret (DDF), collector number 19. Current market price: $0.49, TCGplayer market prices via Scryfall.
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Flying