Artifact-aggro decks like The Blackstaff of Waterdeep and Tempered Steel have already been seeing tournament play, and Nettlecyst immediately becomes the most powerful card in those decks, offering an All That Glitters that costs one more mana but comes with a body that can be moved around for just two mana if it diesthe same cost as All That Glitters
Theres probably some colour matters/keyword shenanigans you can manage with Cerodon Yearling / Relentless Raptor / Sky Terror / Swiftblade Vindicator / Truefire Paladin , but that feels like a different deck
A +1/+1 counter is just as effective at making a creature modified as a -1/-1 counter
You can get your Rakdos discard triggers to kill with Megrim
There is something so haunting about the art for this card, seeing Kefka from under the water, like we (the viewer) are already drowning in poison and the last thing we see is Kefka laughing at us
She's got a rather primitive version of the keyword that we'd know as 'Deathtouch', being able to destroy any creature she comes into contact with