Three Secret Lairs give 40ks Orkz, the high fantasy-bent Age of Sigmar and rowdy football miniatures game Blood Bowl their own MTG cards
Blue and green have a lot of ways to manipulate the top of your deck with cards like Sylvan Library, Brainstorm, Augur of Autumn, and Ponder
Since the trigger is on leaving as opposed to dying, blink and bounce are also on the table here
Mjlnir, Hammer of Thor has more than a few potent applications
Goblin Banneret has really impressed me as a card, but its best with other mentors so that you can get a counter on it, and then it can start putting counters on other things without requiring a mana investment
Salvation Swan First off, this card is funny