OK, this is too ridiculous to be printed, but I was sufficiently amused I wanted to see how it would look. I think it's ridiculously hard to assemble the win condition, although I don't know how much better a dedicated deck could do.

Honestly, controlling a card of each permanent type may be non-trivial :) Maybe this should change to be "are on the battlefield", I think it would still be plenty hard. In fact, I may make this a creature as well, just to give you a fighting chance.

For a summary: creatures are by far the easiest, as there's lots of Changelings which automatically have all allowed creature types, even the weird obscure ones.

Enchantments: You need an Aura and a Shrine. There's little choice of shrines, but at least they exist and aren't useless.

Artifacts: You need equipment (there's plenty, including some free ones and some good ones), fortification (there's only Darksteel Garrison which is not terribly helpful, although it may help here, given the last step of our win condition) and a contraption.

I can't believe they put "contraption" in the comprehensive rules. There are no cards that are contraptions and no cards that can become contraptiosn and no cards that make contraptions. At least we know it's supposed to be an artifact type rather than anything else. I had to put it on this card to allow you to have any (although now it fails because you already sacrificed it.).

Spell types -- this is "arcane" and "trap". Arcane spells are generally a bit overcosted, but not terrible. Traps are at least conveniently cheap under the right circumstances! :)

Land types -- boy, this is the hard bit. Lair, Locus, Desert, Mine, Power-Plant, Tower. The first two are very niche, and the last four have only one card each (due to a painful hack where the "Urza's XXXX" were made into a subtype. Technically, that means Urza's is another subtypes, but fortunately, it only appears on those cards you already need). The only saving grace is that many of the lands are useful to have in play together, although honestly, if you have five basic lands, five lairs, three Urza's lands, two locuses and a desert in play you have twenty-one mana so you might as well run fireball instead of greater coalition.

Hm, this needs reworking.

Bwahahahahaha!

Funny how Uniscape Bracers would help ;)

This means you need to cast both an arcane and a trap, then activate this ability while they're on the stack, and hope neither is countered in response. I would say "If you control a permanent of each permanent type, you win the game," except then you would need a lot of Planeswalkers as well.

Yeah, it's ridiculously hard, but I decided one of each non-planeswalker permanent was hard enough so adding the spells just made it more amusing... I did power it up by making it instant-speed and putting it on a creature, and taking off the sacrifice as a cost. I agree only permanents would more sensible, but when I saw there were only spell types I couldn't resist.

I also considered saying "in play, on the stack, or in the graveyard" to make it somewhat more possbile, but then it would be invite too much graveyard-filling shenanigans, and it would be a lot harder for your opponent to interfere with. Maybe just make the spell types be in the graveyard? (Or, come to think of it, make it triggered by the conditions being met, with no tap at all.)

And yeah, I decided there was no way I was doing all planeswalker types -- that's lots, and if you have ten planeswalkers in play you should have won anyway!

Perhaps an alternative would be to say "if you control permanents with at least two subtypes of each permanent type"...?