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RiotRunner789 says

So, our story begins with an "Experimental Frenzy" in April 2023, when I decided to investigate adding a powered cube to MTG Arena , purely from a card-rule implementation perspective

Crossroad Sonic Chick X EARTH Level 1 [ Winged BeastEffect ] ATK 300 DEF 300 If a Tuner(s) is sent to your GY, even during the Damage Step: You can Special Summon this card from your GY (if it was there when the monster was sent) or hand (even if not), but banish it when it leaves the field, then if "Junk Warrior" or a monster that mentions it (except this card) is on the field, you can change all monsters your opponent controls with 1900 or more ATK to Defense Position, also for the rest of this turn, you cannot Special Summon from the Extra Deck, except Synchro Monsters

The complete opposite could also happen