Creature — Spirit // Enchantment — Aura
Creature — Spirit
Whenever this creature enters or becomes the target of an Aura spell, create a 1/1 white Spirit creature token with flying.
Disturb {W}{U} (You may cast this card from your graveyard transformed for its disturb cost.)
Enchantment — Aura
Enchant creature
Whenever this Aura enters or enchanted creature becomes the target of an Aura spell, create a 1/1 white Spirit creature token with flying.
If this Aura would be put into a graveyard from anywhere, exile it instead.
This card uses a replacement effect ('as [it] enters' or 'enters with') to modify how the permanent enters. This is NOT a triggered ability — it can't be responded to, and effects like Panharmonicon or Torpor Orb don't affect it.
This card's ability triggers when it enters the battlefield, not when it's cast. Effects that double ETB triggers (like Panharmonicon) work here. Countering the spell prevents the creature from entering, so the ETB won't fire.