Two things. First, I need a cleaner way to word this card's marriage restriction ability that prevents the same player from being enchanted by more than one marriage.

Secondly, do I need to say, "In addition to their other colors, types and abilities," or is there a way I can cut that "reminder text" down?

I think you could say "are 6/6 red Dragons in addition to their other colo[u]rs and types and have flying, first strike, haste and "etc"." It doesn't save you much though and if anything it's less clear than your wording.

Pretty fun card. It's like Day of the Dragons meets Essence of the Wild. I think, even though this is a mythic, first strike is overkill.

For avoidance of bigamy, you could abuse the legend or planeswalker rules to get what you want?

Or maybe "Protection from other marriages" does the trick in a sufficiently hilarious way.

(Or just allow it, and wait for the whacky "I'm married to two dragons, and their families both invited me to tea on Sunday!" hijinks that would clearly ensue.)

"All my creatures are dragons" kinda has a wonderfully creepy "My creatures are my babies, and, uh, I guess that makes them half dragon too. Chicken-go-Foom!" vibe to it.

All in all, I think this card is hilarious. It's a nine mana "Win the game by making my opponent collapse in a pile of dragons and laughter" spell.

You shouldn't make too many, but when you do, they should all be this fun.

(If you're looking to drop words though - drop haste. It's not particularly draconic, and you're mostly gonna be caring about the huge flock of sheep you already had that suddenly turned into dragons anyway. First strike is indeed overkill. So what? This isn't a game of kick the ouphe. It's a game of kick the dragon, now!)

A final simplification would be provided by dropping "Enchant player" and have it just be "Creatures you control"
But that would lose the wonderful silly possibility of forcibly marrying an opponent to a dragon. (Making it more plausible - just in time for a Hurricane.)

"Win the game by making my opponent collapse in a pile of dragons and laughter" is an awesome line, that's spectacularly appropriate here, yes. :D

I'm really really tempted to try and word this: Sorcery - Target player is married to a dragon. (Creatures controlled by them are...)

That way you get "You're no longer a Player, you're married to a dragon" hilarity too - which gives the untargetability by other marriages for free.

Sadly, that's way off into "Un" territory. but the wording is so compelling :)

I found the wording for the Marriage clause of this effect in Anti-Magic Aura but you'll have to look at the oracle text.

Well, if you don't want to allow opponents, the wording is much simpler - it's no longer an aura, and is just "You can't be... Creatures you control..."

It's gonna be pretty rare that turning all your opponents creatures into dragons is useful. But hilarious when it is. Cprot-Red? Dragonstalker?

­Katabatic Winds, I guess? Which is an awesome meteorological reference. Though there must be easier ways of achieving the same result :)

­Needle Storm plus a couple Veteran Armorers seems fine.