magic the gathering duskmourn house of horror collector booster box Magic: Duskmourn: Horrors 36pk spanning entity that thrives on the fear of its inhabitants Duskmourn: House of Horror -

Since it does so many things besides drawing a ton of cards, it takes the number two spot

Notably, tokens created by Krothuss dont go away, so those extra Leviathans and such are there to stay

GR Gold Rare Preparation of Rites X SPELL Add 1 Level 7 or lower Ritual Monster from your Deck to your hand, then you can add 1 Ritual Spell from your GY to your hand

That's great value, allowing you to reuse powerful enter-the-battlefield effects for free, while ramping at the same time

Notably, a nontoken creature entering the battlefield will cause the constellation ability to trigger

So perhaps you house rule those in your EDH meta