Nadaar, Selfless Paladin 

Legendary Creature — Dragon Knight
$0.39 #6417 0.05 5.1 years
Vigilance
Whenever Nadaar enters or attacks, venture into the dungeon. (Enter the first room or advance to the next room.)
Other creatures you control get +1/+1 as long as you've completed a dungeon.
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Cards similar to Nadaar, Selfless Paladin expected a card that isn't here?
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+1 more matching line