Yenna, Redtooth Regent

2023-09-01 Any enters-the-battlefield abilities of the copied enchantment will trigger when the token enters the battlefield. Any "as [this enchantment] enters the battlefield" or "[this enchantment] enters the battlefield with" abilities of the creature will also work.
2023-09-01 Except for the listed exceptions, the token copies exactly what was printed on the original enchantment and nothing else (unless that enchantment is itself copying something else; see below). It doesn't copy whether that permanent is tapped or untapped, whether it has any counters on it or Auras attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on.
2023-09-01 If something becomes a copy of the token, the copy also isn't legendary.
2023-09-01 If the copied enchantment has {X} in its mana cost, X is 0.
2023-09-01 If the copied enchantment is copying something else, then the token enters the battlefield as whatever that creature copied, with the stated exceptions.

mtg.wtf