mtg commander precon innistrad Magic: The Gathering Innistrad: Crimson Vow Deck – Spirit Squadron (White-Blue) : Toys & Games reaping rewards turn after turn Tomer's Deck Updates | Innistrad:

I define a tutor as any card that searches your library and puts one or more cards in your hand, graveyard, on top of your library, or onto the battlefield

Songs can be used on the turn they are played if you pay their cost outright, or if you have a character that can sing the song and can be exerted

When it does work, it can copy anything from the extra draw trigger on The Immortal Sun to an annihilator trigger from one of the eldrazi titans

This allows for a much more rounded array of removal and disruption

And, being able to have up to four copies of the same card means you can pick your favorite songs and ensure Ursula is getting her time in the spotlight