The ability to tutor for other Planeswalkers (that you can then draw with Narset) or other key cards (like Doubling Season) is going to be extremely valuable
Exploit only cares if you sacrificed a creature, not where it ended up after that
Titania, Nature's Force First introduced in the The Brothers' War Commander decks, Titania, Nature's Force makes a comeback to add power to the board whenever you play forests from your graveyard
Do you think the old border treatment is a good idea, or do you think its just nostalgia bait
But when Tales of Middle-earth really sings, you can forgive it for some disharmony
Oko's direct impact may not be flashy, but the opponent has to answer him - and all the time they're expending resources trying to remove the three-mana planeswalker, his controller can keep building up their own board, getting further and further ahead