Maddening Cacophony
Sorcery
Kicker 
Each opponent mills eight cards. If this spell was kicked, instead each opponent mills half their library, rounded up.
Jace traced Nahiri to the Singing City, but the magic of the ancient ruins threatened to overwhelm his mind.
Magali Villeneuve
Zendikar Rising (ZNR)
• #67Rulings
If you put a permanent with a kicker ability onto the battlefield without casting it, you can't kick it.
(wotc • 2024-11-08)
The kicker ability doesn't let you pay a kicker cost more than once.
(wotc • 2024-11-08)
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.
(wotc • 2024-11-08)
If a spell's kicker cost was paid, the spell is "kicked."
(wotc • 2024-11-08)
If a card or token enters as a copy of a permanent, the new permanent isn't kicked, even if the original was.
(wotc • 2024-11-08)
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.
(wotc • 2024-11-08)
Rulings
If you put a permanent with a kicker ability onto the battlefield without casting it, you can't kick it.
(wotc • 2024-11-08)
The kicker ability doesn't let you pay a kicker cost more than once.
(wotc • 2024-11-08)
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.
(wotc • 2024-11-08)
If a spell's kicker cost was paid, the spell is "kicked."
(wotc • 2024-11-08)
If a card or token enters as a copy of a permanent, the new permanent isn't kicked, even if the original was.
(wotc • 2024-11-08)
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.
(wotc • 2024-11-08)