Budget Experiment Kraj Combo deck (EDH / Commander)

Pretty much a standard kraj deck
Combos Include:

Gilder Bairn and Gyre Sage/ Incubation Druid/ Karametra's Acolyte/ Marwyn, the Nurturer/ Viridian Joiner = Infinite +1/+1 Counters.

Horseshoe crab and Argothian Elder/ Gyre Engineer/ Gyre Sage (With Orochi Leafcaller)/ Incubation Druid (With Orochi Leafcaller)/ Karametra's Acolyte (With Orochi Leafcaller)/ Marwyn, the Nurturer (With Orochi Leafcaller)/ Viridian Joiner (With Orochi Leafcaller) = Infinite mana

Etcetera, Etcetera. Basically, most of the untap creatures along with anyone who makes 2 or more mana per tap can make infinite mana, and therefor infinite counters. With Knacksaw Clique you can mill the opponents entire library, and Leech Bonder functions really only as an untap. In addition, as long as you have an infinite untap combo with Kraj, then it can give itself an infinite ammount of +1/+1 counters.

If you have infinite mana, then Simic Ascendancy is a win a turn later.

If you have infinite +1/+1 counters, then Simic Ascendancy (Once again, a turn later), Sage of Hours (Infinite turns, basically instant win), and Triskelion are all instant wins.

If you have infinite untaps on Kraj, then Psionic Gift is an instant win.

You can also make Kraj an ∞/∞, then you can give it trample with Thornling or Shadow with Jodah's Avenger for what is most likely an instant win. Fly can also give you a near win, but there are far more creatures with flying/reach than with shadow. Regardless, by the time you get an infinite untap combo, you can probably win the game. Remember you can also use enemies activated abilities as well, so if you're playing Krenko, Mob Boss, then it's time for INFINITE GOBLINS. (If you take control of a goblin first)