Carth the Lion
Legendary Creature - Human Warrior | Power/Toughness: 3 / 5 (CMC 4)
Whenever Carth the Lion enters the battlefield or a planeswalker you control dies, look at the top seven cards of your library. You may reveal a planeswalker card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
Planeswalkers' loyalty abilities you activate cost an additional +1 to activate.