This feels like another opportunity to swap some card slots around to accommodate their rarity. To me this looks like a bog-standard card which makes a lot of sense at common. In contrast to that, Mischievous Brownie feels way too complicated for a common.

Btw, Ingenious Prodigy in standard suggest that skulk might have become deciduous, so it might be appropriate to use the keyword straight-up rather than spell it out.

If you choose to use flash as a keyword, note that the general convention is to separate flash from other keywords as their relevance is generally different - flash only matters when the card is in your hand/stack where as the usual creature keywords are relevant while the the card is in play - see for example Faerie Duelist, Spectral Sailor, Errant, Street Artist, etc. This btw applies to Ancient Chewer and (((Unlikely Recruit))).

Removed the skulk ability and changed it to be more "bait" related. (Also changed some rarities and seperated the flash keyword on the other cards.)

This seems like a fun way to fight interaction, although maybe a pinch of tweaking on the wording? Bolt Bend says "Change the target of target spell or ability with a single target"; as-is this might not parse if a spell has multiple targets.

It can also steal auras trying to enchant a creature, which is hilarious. I almost wanna say, maybe you have to require the thing you change the target of to be targeting something you control, but maybe it's fine for this to do that kind of trickery.

Thanks for your comment, mr. RatLantern! I'm glad you like the little jellyfish.

I had to do a lot of research for this one, and eventually I found a card named Spellskite, which was basically what I wanted this card to be. Only, I wanted Jellybell Bait to be slightly worse as it has just its ETB effect.

According to Spellskite, you don't need to specify it as a single target: "If the spell or ability has multiple instances of the word "target," you choose which one target you're changing to Spellskite as Spellskite's ability resolves. If a spell or ability has multiple targets but doesn't use the word "target" multiple times, such as the ability of Deepglow Skate, you can only change one of the targets to Spellskite."

So I guess the card's fine ¯_(ツ)_/¯

Oh, you're right! Spellskite doesn't specify it has to be one target. It does, however, have one tiny difference! It says "change a target", rather than "change the target". If you adapt that in to Jellybell Bait, then when it enters you can change a target. Maybe that would work?

Ms. is preferred over Mr.; and yay for the Jellyfish!

Apologies for assuming, ms. RatLantern!

I will change the text. Thanks again for your comment.