I can summon anyone?

Auto cards enabled. You open a portal to another world, and unlike usual, you can summon anyone to your world! By accidently summoning a fragment of a greater being, Kelvoz, he allows you to use his power on a whim. You can look into any world without being noticed, and summon as many beings as you like from any world to your own. However, it's a one way trip, no way to send them back. How will you use this power?