I would be interested in a ‘Change Card Type’ feature, similar to the way both MDFCs and the ‘Change Mana Cost’ features work.
I often change the CMC of cards with alt costs to whatever I expect to be regularly paying for it (like {0} for solitude or {U}{U} for Murktide) and sometimes I think it would nice to do the same with types.
As an example use case, Stormchaser’s Talent is often thought of as a Creature (in addition to an Enchantment) in prowess decks, so I’d like to be able to control the types and have it either show up as a Creature or have the ‘+1 other’ text appear next to creatures. The same would be true for cards like legion’s landing, cori steel cutter etc.