Kellan, Daring Traveler // Journey On dmu the player casts it without

the player casts it without paying its mana cost if able

• Return target permanent to its owner's hand

you may cast up to one target instant or sorcery card from that player's graveyard without paying its mana cost

When Krenko's Buzzcrusher enters the battlefield

Planeswalkers' loyalty abilities you activate cost an additional [+1] to activate

Kellan, Daring Traveler // Journey On dmu the player casts it withoutWhenever Kellan, Daring Traveler attacks, reveal the top card of your library. If it's a creature card with mana value 3 or less, put it into your hand. Otherwise, you may put it into your graveyard. Create X Map tokens, where X is one plus the number of opponents who control an artifact. (Then exile this card. You may cast the creature later from exile.)