Laiylle, Draconic Herald

Flying, haste, first strike
Whenever Laiylle, Draconic Herald deals combat damage to a player, exile that many cards from
the top of your library. You may play those cards
until your next turn. If any of those cards are
Dragon creature cards, repeat this process.
"All I wish for is an end to the bloodshed. If that end
can come only when the final banner of the Empire is
bathed in dragonfire, then so be it."