For each mulligan your opponent takes, you may draw one card
Decks With This Card Recent public and tournament decks using XX-Saber Darksoul
The gate deck really did have everything powerful, efficient (after discount) creatures with evasion, a sweeper that could often be one-sided, a massive card advantage engine in Guild Summit, stabilization against aggro decks via Archway Angel, and recursion with Gate Colossus
Then the Falconer in White with outlast and the Izzet Hive Tyrant in with flying and haste base on a five-drop 4/4 will give them flying
Nothing prevents its owner from venturing into that dungeon again if another spell or ability instructs them to, though they would have to start from the topmost room again
Bring them in, theyll look it over and make a real offer