Reveillark : Returns us creatures with power 2 or less.

Mirror Entity : Its a sac outlet that you can trigger a 1000 times on the stack if you wish.

Ashnod's Altar : It is another sac outlet that provides you mana as well.

The first type of combo is we are going to assume your using Mirror Entity instead of Ashnod's Altar . These pieces are interchangeable should you wish.

You may also use Saffi Eriksdotter instead of Karmic Guide . Again these pieces are interchangeable, but you have to realize how to they work in their own right.

Karmic Guide + Mirror Entity + Reveillark : The order does matter, it always goes Reveillark , Creature, then Karmic Guide being sacrificed to Mirror Entity

Your Reveillark hits the graveyard bringing back two creatures, one of them must be a Karmic Guide the other is up to you. The only thing to remember is we are looking for power two or less. The Karmic Guide comes in last returning your Reveillark . The middle option is the creature you wish to bring back for the desired effect.

I'm not sure I understand the Mirror Entity . Do I make my creatures 0/0? But then I'd be forced to lose all of them including any tokens on the field? I don't understand why I would want to do that. It seems more reliable to use Ashnod's Altar (or really any other sac outlet) as that is a single one.

That's a very interesting combo though. It gives me a bit of a Popsicle headache but I think I understand it as I can keep sac'ing and recovering any creature with power 2 or less.

Yes, that is exactly what you do with Mirror Entity . You put the triggers on the stack at least twice.

The way I built the deck was to function as a toolbox deck, so with this combo I am essentially pulling off what I need.

Your never going to have every creature you have in the deck on the field at the same time when you play this combo. So don't worry about killing all your creatures, its a reactive move most of the time.

I have a bunch of combos in my deck description for you to look at, should you wish to get any ideas.

Hope that helps.

The hardest combo I have wrapping my head around is Angel of Serenity + Deadeye Navigator . I get the basics, but its the fine detail that always escapes me.