Strifer, Sage of Adelhyde

At the beginning of each upkeep, exile the top
card of your library. You may play cards exiled
this way until the end of your next turn.
{t}: Strifer, the Fire Sage deals 3 damage to any
target. If the target was a creature, put three
burn counters on it. (At the beginning of each
upkeep, each creature with one or more burn counters
on it is dealt damage equal to the number of burn
counter on it.)