Feradin Nightblade

Feradin Nightblade gets +1/+1 and has intimidate as long as an opponent controls a planeswalker.
Whenever Feradin Nightblade would deal combat damage to a planeswalker, instead gain control of it, then put five loyalty counters on it.
{2}{u}{u}{u}, {t}: Gain control of target creature. Activate this ability only if an opponent controls a planeswalker.