Favorite big spells in dimir

I’m building Kang Prime right now with a bunch of clones and blink effects so I can get as much activations as possible for kang so I can get more clones to get more manga and have the lore accurate kang army but I have no big finishers in the deck asides cellarspawn and I feel like it’s a waste to when I’m casting my entire deck for free to not have something big in my deck but I don’t know exactly what to put in it because my pod has a limit on extra turns so I’m wondering what everyone else favorite big bad spells are

https://moxfield.com/decks/DMElirSbYUO0yvDp8sFYXA