Heralds Horn and Elven Chorus both let you dig through the top of your deck and, one way or another, make it easier to cast creatures
I wasn't eager to have an Avenger of Zendikar stunt double
Its a nice win condition for Aetherworks Marvel decks that can help dig to find the card as well as cast the first copy, which doesnt need to be cast from hand
This in turn lets you venture into the dungeon, (I recommend Tomb of Annihilation because its the shortest), and reanimate your creatures while also getting whatever benefits the dungeons have
You can see this style of design in Niv-Mizzet Reborn, Korvold, Fae-Cursed King, and Vantress Gargoyle, as well as many classic threats like Thing in the Ice, Deaths Shadow, and all the Theros and Amonkhet gods
If the power of the target creature cards changes while in your graveyard, most likely because one has a characteristic-defining ability that defines a * in its power, the total power of the creature cards may become greater than 10