Whenever Durnan attacks, look at the top four cards of your library. You may
exileTo exile an object, move it to the exile zone from wherever it is. See rule 406, “Exile.” (CR 701.13) a creature card from among them. Put the rest on the bottom of your library in any order. For as long as that card remains exiled, you may
castTo cast a spell is to take it from the zone it’s in (usually the hand), put it on the stack, and pay its costs, so that it will eventually resolve and have its effect. A player may cast a spell if they have priority. See rule 601, “Casting Spells.”
To cast a card is to cast it as a spell. (CR 701.5) it. That spell has
undauntedUndaunted is a static ability that functions while the spell with undaunted is on the stack. Undaunted means “This spell costs less to cast for each opponent you have.”
Players who have left the game are not counted when determining how many opponents you have.
If a spell has multiple instances of undaunted, each of them applies. (CR 702.125). (It costs
less to
castTo cast a spell is to take it from the zone it’s in (usually the hand), put it on the stack, and pay its costs, so that it will eventually resolve and have its effect. A player may cast a spell if they have priority. See rule 601, “Casting Spells.”
To cast a card is to cast it as a spell. (CR 701.5) for each opponent.)
Choose a BackgroundThis ability allows a legendary creature to be your commander alongside a Background with the stated relationship. (CR 702.124) (You can have a Background as a second
commanderA designated card for a Commander deck, governed by the command-zone, color-identity, and Commander rules. (CR 903).)