Is Make a _____ Splash legal in Standard, Modern, and Commander?

Make a _____ Splash is legal in: Commander. It is banned in: Legacy, Vintage.

Make a _____ Splash

Q: What type of card is Make a _____ Splash?

Make a _____ Splash is an Enchantment. Its oracle text reads: "Flash When this enchantment enters, you may put a name sticker on it. Whenever you put a sticker on this enchantment, tap up to X target creatures, where X is the number of u's in name stickers on this enchantment."