Just having an annoying Bloodghast to recur can be game over if you wipe out their hand along with a bunch of lands
While players likely will not use the Joltik to attack, N's Zoroark can copy this attack while Joltik is on the bench, which might be a secondary strategy for the deck so that it can slow the game down or deal with Budew in the Dragapult ex matchup
Dont forget that you can activate the ability on your opponents turn too, allowing you to go from zero cards to seven (including your draw for the turn) in just one turn cycle
White creatures usually have lots of keyword abilities like flying, first strike, double strike, lifelink, or vigilance, and as such it makes sense to enhance those
While there are lots of artifacts in the set, Im skeptical that just any Blue deck can turn this into a card worth playing, so it feels like this needs a buildaround grade