Stop the Opponent Blocking There are certain red cards that can prevent creatures from blocking entirely
Over the course of the game, your threshold cards get online, your recursion gets stronger as you have more tools, and you can reanimate a large threat, or just constantly hit them with cards like Syr Konrad, the Grim while also making zombies to chump-block or sacrifice
However, for this one, the Oracle text is even more precise: Target player discards two cards, then draws as many cards as they discarded this way
Anyway, the Wisp was great, it was Blacks defense against all the big flyers out there in the other colors, just save one Black Mana for regeneration and the Wisp lives to regenerate another turn
That might sound like a drawback, but with a little deckbuilding finesse, it becomes a win condition