Stoneforge Mystic + Cloud, Midgar Mercenary Magic has plenty of broken equipment to tutor up with Stoneforge Mystic
Riptide Gearhulk Riptide Gearhulk natively combines double strike with prowess, allowing you to hit for a ton while simply playing your card draw, removal, or cantrip effects
Sets that primarily take place there : None Planeswalker natives (with planeswalker cards) : Jace Vryn is Jace's homeworld
Generally, you are focusing more on the lifegain, as the mill cards are rarer
One could argue that Jumbo Cactuar is not broken at all, and that there are already some very powerful cards that can single-handedly win a game even without 10,000 power, and that is true
These cards are great for crafting, as theyre sturdy and durable (a friend recently left one out in the rain overnight and other than some slight warping it was undamaged), and theyre basically art cards, so they provide a great deal of colour and aesthetic to work with