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
Whenever the equipped creature deals damage, you can put a +1/+1 counter on a creature, then proliferate
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
If you want an EDH deck that abuses this to its full potential, we wrote a guide on it
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