Knowledge is power as they say, and Ursula's Cauldron provides the player with the knowledge and choices they need to plan their future turns
Then all of our spells are reduced by that counter number
Live your fantasy with 9 Play Boosters, 32 Basic Land, of which 16 are Traditional Foil, 2 Traditional Foil extended art cards, an oversized Spindown Die and a storage box
Umezawa's Jitte from Kamigawa also deserves a shoutout for making creature combat a nightmare
There are ways to play around this, but Emerald/Sapphire is usually the epitome of ramp decks, meaning it could backfire as a strategy
Necropotence Necropotence is the among pinnacle of black card draw spells, allowing you to pay 1 life, repeatedly, to exile the top card of your library and put that card into your hand at the beginning of your next end step