Liliana and Jace Planeswalker

First off, drop the "and" from the type line. If you do, the card will count as both Jace and Liliana for the purposes of things that care about that, such as the planeswalker rule. If you don't, it'll also count as an "and" which doesn't make any sense at all but that's what the card and the rules say.

Second, the third ability needs to let you look at your opponents' hands because otherwise it's too easy to cheat with it.

Third, the last ability needs to be written as "Each player exiles the top ten cards of his or her library. Put all creature cards exiled this way onto the battlefield under your control." Yes, I know that using "his or her" rather than "their" is kind of annoying for people who don't identify with a gender, but that's how WotC words these effects and they go out of their way to keep templating consistent. Even in the Un-sets, where they throw most of the rules out the window, there are only two cards that break standard templating: a card that needs to in order to avoid ambiguity, and a card that's actually named Ambiguity and was intentionally confusing.

Finally, this is way too powerful to be five mana, even if four of it is split between two different colors.