Not only do you get a sizable 2/2 for two mana, but you also get one of the best abilities put on a Rebel this side of the actual search mechanic
Not only is Zoro an aggressive card that can be played quite early into the game, but it is quite a nuisance once it is played since its attack is 5,000
Maybe thats the decaying part of this red instant, but it does limit how effective each additional cast of the card is
(2023-09-01) An effect may refer to a card, spell, or permanent that "has an Adventure." This refers to a card, spell, or permanent that has an adventurer card's set of alternative characteristics, even if they're not being used and even if that card was never cast as an Adventure
You can also use stuff like Hungry Ghoul alongside this, though that shouldnt be necessary in most games