You'll be able to play strong creatures that instead of having downsides (mostly) will instead turn those into benefits. In addition, you can keep this card in your hand the whole game if you want, having it soak up those "card discards" until you feel like dropping it to end the game as a large finisher for only 2 mana.
If Disco-zoo gets even more synergy I shudder at the strength it will have next cycle.
Not as insane as it first appearsas you will almost never get a 4/4 on turn 2, but still. The ability to negate discard alone is HUGE in pushing discolock and the potentially massive body for 2 mana can help swing you back into a game after losing tempo from playing the quest card.
You can say it forces an archetype but seeing as how Renolocks will only be viable in wild and they've already had a handful of discard cards , and why not make them useful ? I really wish blizzard would implement forcing your opponent to discard cards or punishing them for having too many / little cards in your hand. Or maybe I just reallyed like The Whole megrim , rack concept back in mtg.