When Departed Deckhand becomes the target of a spell, sacrifice it.
Departed Deckhand can’t be blocked except by Spirits. : Another target creature you control can’t be blocked this turn except by Spirits.
If the spell that targets Departed Deckhand has no other targets, it won't resolve (because it no longer has a legal target after Departed Deckhand is sacrificed).
13-07-2018
wotc
You'll sacrifice Departed Deckhand even if you counter the spell that targets it.
13-07-2018
wotc
Activating Departed Deckhand's last ability after a creature has become blocked by a non-Spirit creature won't cause that creature to become unblocked.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.