The Speaking Circle

At the beginning of each end step, destroy all
sites and planeswalkers your opponents control.
The Queen of Glass's Agenda: (Search your
library for three cards with mana value 3 or less and
exile them as agenda cards, then shuffle. Choose and
cast one agenda card without paying its mana cost
when this enters and each of your upkeeps until all
of them have been cast. At the beginning of your next
upkeep, play the hero.)