Black Sun's Zenith — Wave of Decay

Black Sun's Zenith is a board reset that scales with the game state. Cast it for X and two black mana to distribute X negative one slash negative one counters across every creature. The card recurs immediately by shuffling itself into its owner's library which makes it reliable in long games and excellent in a control deck that can stall until the right moment to sweep. Experienced commanders will value the flexibility between a modest soft answer and a game changing blow depending on the X chosen.

In the context of Karlov Manor the effect carries a grim, mechanical finality. Use it to blunt wide token strategies, neuter large boards of opposing creatures, or to sculpt your own board when combined with creatures that benefit from counters or sacrifice triggers. Timing matters more than spectacle here. Plan the X value with removal sequencing and your own synergies in mind to convert mass attrition into advantage.

Card Details:

• Mana Cost – {X}{B}{B}
• Card Type – Sorcery
• Subtypes –
• Card Text / Rules Text (Printed) – Put X −1/−1 counters on each creature. Shuffle Black Sun's Zenith into its owner's library.
• Power / Toughness –
• Loyalty –