Precipitous Drop

Enchant creature.
When Precipitous Drop enters the battlefield,
venture into the dungeon. (Enter the first room or advance to the next room)
Enchanted creature gets -2/-2. It gets -5/-5
instead as long as you've completed a dungeon.
As he fell from Dive Rock, he had a long while to
wonder why he idolized a bloody brute from the
Imperial Arena.