Armageddon and Ravages of War are two examples that only destroy lands, but some wraths like Balance, Obliterate, and Worldfire hit pretty much everything
In the unusual case there are no appropriate cards in exile to target and no player may legally be chosen as a target, the ability is removed from the stack with no effect
She's already a lord for all of your creatures, and as a Human, she can benefit from anything that benefits Humans, intuitively enough
All you need to do is have the required wildcards in the appropriate rarities
I think originally it felt like this card was designed to counter the Overlords, netting you a card against your opponent casting one for its Impending cost
Descend 8 - Whenever you draw a card, if there are eight or more permanent cards in your graveyard, target opponent loses 1 life and you gain 1 life