mtg cards that mill This Card Is Boring, But Absurdly Strong Force of Mill

4 Basal Thrull One of the creature types from the early days of Magic that has fallen out of use in recent years, Thrulls have an interesting history in terms of how their appearance and function have changed over time

You can cast The Scarab God all game long for the regular five-mana which, let's be honest, is way too cheap for a card with this power level

Then cast them with the mad mana making of #1

for example, if you have drawn multiple copies of Kolvori and want to get use out of the extra copy, or if you have nothing to do on Turn 2 and developing a slightly-below-rate mana rock is better than doing nothing