Lae'zel, Vlaakith's Champion

[Lae'zel's Acrobatics {1}{w}, Instant-Adventure:
Return target nonpermanent spell to its owners
hand. Draw a card.]
Lae'zel has Ward {1} and Reach for each
differently named dungeon you've completed.
Whenever an opponent casts a spell on your
turn, Venture Into The Dungeon.
Choose a Background.