Alatreon, King Tyrant

Flying,Trample
Eminence- At the beginning or your endstep, if one or more Dragon or Wyvern creatures entered the battlefield under your control, create a 2/2 Wyvern creature token that is all colors.
When Alatreon enters the battlefield look at the top 5 cards of your library, you may reveal any wyvern/dragons from among them and put them in your hand.