Finale w/ haste for a dork, activate thrasios on top of bowmaster trigger until you hit veil of summer, cast veil (with the dork), draw deck. Endurance finale back into library. Play your creatures. Big finale 😎
you could have responded to his bowmaster target when he targeted kinnan .... just activate the monolith and make infinite mana then do the thrasios thing until you hit a protection piece ....