Alva, Master Puppeteer

Deathtouch, ward {2}
When Alva, Master Puppeteer enters the battlefield target opponent becomes the monarch.
At the beginning of the monarch's upkeep look at
the top two cards of their library. Choose one of
them. That card goes into exile face down and the
other card is put back on top of the monarch's
library. You may play cards exiled with Alva,
Master Puppeteer.