Carth the Lion (Modern Horizons 2 418e) - Rare

Whenever Carth enters 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.