To defeat a planeswalker, you can attack it with creatures, deal damage with spells, or remove its loyalty counters through direct removal until it reaches zero and goes to the graveyard
Disney Lorcana TCG events are designed to bring people together who are seasoned players and new to the game
I expect Ulrich of the Krallenhorde to be a fringe playable at best, but I have certainly been wrong before, and wouldnt be surprised if Im wrong again
Vorinclex, Monstrous Raider featuring the Kaldheim set symbol with collector number 407
Stone-Throwing Devils Magic Arabian Nights Keep track of your collection value over time
You could also use it on yourself, potentially saving a damaged character from your own field, retrieving it, and then getting that same discard benefit