Nimbasa, the Watchful Cloud

Flying, defender
Each player plays with the top card of his or her library revealed. At the beginning of each turn, creatures get -1/-1 until end of turn for each
creature revealed in this way. Noncreature spells
cost {1} more to cast this turn for each
noncreature card revealed in this way.
"Those that I fight I do not hate, those that I guard I
do not love."
- W.B. Yeats