Something I suggest making it more OP is to make is to add an effect on at least Mastered UI Goku that says, "If a card is unaffected by card effects, cannot be targeted by card effects, cannot be destroyed by battle, or cannot be destroyed by card effects, it can be." or something along those lines as it completely negates card protection.
[cardlist] [Creatures] *4 Foundry Street Denizen *4 Reckless Bushwhacker *4 Goblin Guide *2 Goblin Chieftain *3 Goblin Piledriver *4 Legion Loyalist *4 Mogg Fanatic *4 Mogg War Marshall *4 Goblin Bushwhacker [/Creatures] [Spells] *4 Lightning Bolt *4 Goblin Grenade [/Spells] [Lands] *4 Bloodstained Mire *4 Wooded Foothills *11 Mountains [/Lands] [/cardlist] Yep
1/1 Bird tokens might not seem like much, but it only takes a couple of turns until you have a massive army in the air
Then you can simply type /reloadscripts in the chat to load your scripts after you make changes to it
On a lesser note, some obstacles and enemies, when successfully defeated, allow you to attempt to close a location immediately