Since there are no disruption methods other than monster effects on the field, it is extremely weak to Forbidden Droplet
, retro players often resort to one particular monster to cheat fusion monsters out of the extra deck, as Magical Scientist saw competitive play in various decks
The WOTC -era cards are nearly identical (except the 25th Anniversary logo of course), except they removed Wizards from the copyright notice
But the third option that puts a +1/+1 counter on every creature is much more potent than the one that just generates a 2/1
That would be a pretty reasonable thing to do on most Turn 2s, but is a much bigger ask on Turn 3, which is where higher plot costs prove to be detrimental the further behind you are on the battlefield
Against Sky Striker, Crackdown can be used on Sky Striker Ace Shizuku during the Main Phase before going into the End Phase