Make a _____ Splash

• WOTC Official Reminder Textofficial rules
  Flash — You may cast this spell any time you could cast an instant.

• WWizards of the Coast2022-10-07
  Official Ruling
  Once the last ability triggers and targets are chosen, changing the number of u’s in name stickers on this enchantment won’t change the number of targets.
• WWizards of the Coast2022-10-07
  Official Ruling
  The last ability will trigger whenever you put any kind of sticker on this enchantment, not just name stickers, although only u’s in name stickers will count toward the number of targets. Notably, u’s in ability and art stickers won’t count.

Rulings via Scryfall