Card

Maddening Cacophony

Mana cost {1}{U}

Kicker {3}{U} Each opponent mills eight cards. If this spell was kicked, instead each opponent mills half their library, rounded up.

Part of 7 known combos, 5 of them two-card. 6 official rulings.

Bracket

B1 Exhibition — Not in the same deck as its two-card combo partners: Bruvac the Grandiloquent, Riverchurn Monument, Duskmantle Guildmage, Keening Stone, Doomsday Excruciator
B2 Core — Not in the same deck as its two-card combo partners: Bruvac the Grandiloquent, Riverchurn Monument, Duskmantle Guildmage, Keening Stone, Doomsday Excruciator
B3 Upgraded — Not in the same deck as its early two-card combo partner: Bruvac the Grandiloquent
B4 Optimized — allowed: No restriction beyond the banned list
B5 cEDH — allowed: No restriction beyond the banned list

Two-card combo with Bruvac the Grandiloquent, Riverchurn Monument, Duskmantle Guildmage, Keening Stone, Doomsday Excruciator (early with Bruvac the Grandiloquent)

Bracket: Lotus Vault analysis, with Commander Spellbook flags

7 known combos, 5 of them two-card.

2024-11-08 · Wizards of the Coast
If you put a permanent with a kicker ability onto the battlefield without casting it, you can't kick it.
2024-11-08 · Wizards of the Coast
The kicker ability doesn't let you pay a kicker cost more than once.
2024-11-08 · Wizards of the Coast
To determine a spell's total cost, start with the mana cost (or an alternative cost if another card's effect allows you to pay one instead), add any cost increases (such as kicker), then apply any cost reductions. The spell's mana value remains unchanged, no matter what the total cost to cast it was.
2024-11-08 · Wizards of the Coast
If a spell's kicker cost was paid, the spell is "kicked."
2024-11-08 · Wizards of the Coast
If a card or token enters as a copy of a permanent, the new permanent isn't kicked, even if the original was.
2024-11-08 · Wizards of the Coast
If you copy a kicked spell on the stack, the copy is also kicked. If the copied spell is a permanent spell, the token the copy of that spell becomes when it enters is also kicked.

Rulings: Scryfall · Wizards of the Coast