In fact, when you hear players talk about the ability today, you may hear them use the term "loot" instead of the lengthier, "draw a card, then discard a card." Loot is the shortcut term for this mechanic because it was named after Merfolk Looter, a creature that taps for this ability
But as that ability resolves, you can then cast the card for its madness cost rather than its mana cost
The most fun thing it does, honestly, is that Ghost Ark turn where your whole graveyard stands back up at once and the table realizes the board they just cleared is already back
Heroes of the Realm cards are typically awarded to Wizards of the Coast employees to recognise their hard work
Players can also have hexproof, and in these scenarios a player with hexproof cant be targeted by spells or abilities, although their creatures and permanents are still able to be targeted