If you want an EDH deck that abuses this to its full potential, we wrote a guide on it
While there are all kinds of practical things we can talk about, ranging from collective experience to personal preference between colors and un-like effects, we can't necessarily talk about them in strict terms
Aside from the obvious signs that the ring to rule them all may have a serialized copy, there could be a larger net being cast with this statement: 20 rings, each serialized to 1000, for 20,000 total & still about 3 times rarer than BRO serial cards
Overall, if someone can't remove Jin-Gitaxias very quickly, the chances that you'll be in the game for long aren't good
Exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.) Creature - Dog Overlord of the Floodpits Impending 4 (If you cast this spell for its impending cost, it enters with four time counters and isn't a creature until the last is removed