貴様の悪夢を止められるものは血のみ/Only Blood Ends Your Nightmares

Scheme -
When you set this scheme in motion, each opponent sacrifices a creature. Then each opponent who didn't sacrifice a creature discards two cards.

Scheme -
When you set this scheme in motion, each opponent sacrifices a creature of their choice. Then each opponent who didn't sacrifice a creature discards two cards.