Fenskar, The Dark Root

During your upkeep, put a +1/+1 or a -1/-1
counter on Fenskar.
If there is a +1/+1 counter on Fenskar, he
has persist and defender.
If there is a -1/-1 counter on Fenskar, he has
undying and cannot block.
{1}: Put Fenskar into your hand. You may
use this ability while this card is in exile.