Outside of their own Loot ability, there are a limitless amount of ways to abuse discard-based abilities like this one
For every Reserved List staple clogging up Commander wish lists, there is a legal, reprinted, budget-friendly card doing a version of the same job
Kefka, Court Mage // Kefka, Ruler of Ruin Rarity: Mythic Rare TYPE: Legendary Creature // Legendary Creature SUBTYPE: Human Wizard // Avatar Wizard CMC: 5 Mana cost: USD: $162.67 EUR: 95.73 TIX: 0.00 EDHREC RANK: 3169 (4/5) Whenever Kefka enters or attacks, each player discards a card
The most important ability is it being able to sacrifice other creatures, put -1/-1 counters on creatures and draw cards
100% it is possible, and it's possible to damage cards using any method if you are rough, but it is fully avoidable