Vashna's Longboat

Crew 4 (Tap any number of untapped creatures you control with total power 4 or greater: This permanent becomes an artifact creature until end of turn.)
When Vashna's Longboat is put into the
graveyard from the battlefield, it deals 5 damage
to target creature or player.
"Suddenly, a massive longboat emerges from the wall
of fog and comes speeding towards the quay."
- Joe Dever