Naya Vexing Collector (Modern)

This is a combination of Magic Aids' pelt collector/vexing devil combo and a deck Saffron Olive made when BloodBraid Elf got unbanned, although now I've taken BBE out due to its high cost and replaced it with more of the already present cards like Experiment One and Bushwacker, plus three of Exemplar of Strength.

Speaking of Exemplar, you want to make sure that you put its trigger on the stack FIRST, that way Collector and Experiment can fire resolve theirs before Exemplar shrinks into a 1/1.

If the game for whatever reason drags on (or god forbids, you got flooded), you have a couple of Earthshaker Khenra that can be eternalized into 4/4's and swung in for lethal, though that will be a very rare occurrence, by my experience, more often than not, Earthshaker Khenra will just be an alternative to Bushwacker on turn 2, helping you get a blocker out of the way and (hopefully) swing in with 4 points of damage or more along with a one drop.

Finally, you have Rhonas the Indomitable and Lupine Prototype as your big hitters (and they grow your experiments and collectors further in the late game), they work especially well together since Prototype comes in at 5 power without any need to grow, and curves into Rhonas perfectly.

Your prototype should not have any problems attacking past turn 4, the deck is pretty low cost and it can definitely clench some dragged out games, and it makes your mulligans less painful by a lot, I can't tell you how many times it won me a game after mulliganing, sometimes even to 5.