Once at least four creatures have died, you don't ever even need to play Sephiroth, as every death will drain an opponent for one life
While it normally taps for red, you can exert it to grant haste to one or two creature spellsperfect for curving into threats that need to swing right away
They could both be considered good or bad, depending on your board state at the time
The Extended decks that Watchwolf would naturally go in have creatures that are just that little bit more outrageous, and the last few years have raised the bar to the point where Watchwolf no longer stands out
My issue with Sledge-Class Seedship is that it doesnt have an enters ability, so youd better have big creatures to station it quickly if you want to get some value out of it
Because of this, damage on Woodland will actually carry over into the next turn