Whether you choose to go tall with Ezuri, Claw of Progress or wide with Atraxa, Praetors Voice, building your creatures up to titanic proportions with +1/+1 counters is a tactic as old as time
Ral will deal one damage each time an instant or sorcery is cast and with infinite loops comes infinite damage
Captivating Vampire captures that essence of converting creatures into vampires Olivia's Wrath is a powerful one-sided board wipe that is super effective outside of mirror matches
Then there's blue's connection to delve, flashback, and harmonize, all of which get cast or activated from the graveyard, so much that you might call this Diver a Driver because it's a key piece of mill and card advantage engines
Then you can tap this for one mana to make a token of another nonlegendary dork you control with haste that gets sacrificed at the end of the turn
Protective Embrace can essentially make your other cards in play impervious to songs or actions