Urborg Lhurgoyf

• WOTC Official Reminder Textofficial rules
  Kicker — Kicker [cost] (You may pay an additional [cost] as you cast this spell.)

• WWizards of the Coast2022-09-09
  Official Ruling
  You may kick Urborg Lhurgoyf only once for its cost and only once for its cost. You can kick it twice by paying , but you can't kick it twice by paying or . You can't kick it more than twice.
• WWizards of the Coast2022-09-09
  Official Ruling
  Urborg Lhurgoyf's second ability isn't a triggered ability and doesn't use the stack. Players can't cast spells or take other actions after it enters the battlefield but before its controller mills cards.
• WWizards of the Coast2022-09-09
  Official Ruling
  If it was kicked, Urborg Lhurgoyf enters the battlefield with a power and toughness determined by the number of creature cards in your graveyard after you have milled cards for each time it was kicked. For example, if you have one creature card in your graveyard before it enters the battlefield and you mill two more creature cards with its ability, it enters the battlefield as a 3/4 creature.
• WWizards of the Coast2022-09-09
  Official Ruling
  The ability that defines Urborg Lhurgoyf's power and toughness works in all zones, not just on the battlefield.
• WWizards of the Coast2024-11-08
  Official Ruling
  If a spell's kicker cost was paid, the spell is "kicked."
• WWizards of the Coast2024-11-08
  Official Ruling
  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.
• WWizards of the Coast2024-11-08
  Official Ruling
  If you put a permanent with a kicker ability onto the battlefield without casting it, you can't kick it.
• WWizards of the Coast2024-11-08
  Official Ruling
  If a card or token enters as a copy of a permanent, the new permanent isn't kicked, even if the original was.
• WWizards of the Coast2024-11-08
  Official Ruling
  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.
• WWizards of the Coast2024-11-08
  Official Ruling
  The kicker ability doesn't let you pay a kicker cost more than once.

Rulings via Scryfall