Whenever 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.
Journey On
Sorcery - Adventure
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.)
Locations
