It costs the right amount of mana, and can potentially help a one-drop rich deck cheat on mana
Also watch out just in case if it hasn't happened to you already by this point where you block but can't move until what feels like until you get hit
Whenever you take interactions that don't allow you to complete the Adventure Token combo, you will need to adapt your plan, often using Adventure Token along with a level 2 monster to get to Spright Sprind, since to perform your full combo, you need a combination of 3 cards, being 1 "starter" Adventure Token, 1 "starter/extender" Spright and any other level 2 monster
If Bonecrusher Giant, Embercleve, and Skyclave Shade are in the mix sign me up
You're either controlling what dies or this becomes a [acronym='Hearthstone terminology
Also, 4 mana is a big cost upfront, and you might not get much from it