Grenzo, Modular Artifact +1/+1 Counter Toolbox (EDH / Commander)

Hey girls 'n guys!

Bring Grenzo for CMC 3 and use his ability to mill your lib from the bottom up constantly. Therefore:
Try to fetch "Blinkmoth Urn", "Ashnods Altar", "Krark-Clan Ironworks" and so on... and pump all this Mana into Grenzo.

Tap the Urn with 'Blinkmoth Well', 'Lodestone Myr', 'Ghirapur Æther Grid', 'Relic Barrier'... to prevent opponents to benefit from the mighty urn ~.~

The more cards you get in your GY, the more access you get to the necessary utility, because the support and utility creatures enter the battlefield automatically during the mill process.

Use the 'Myr Retriever', 'Junk Diver', 'Workshop Assistant', 'Arcbound Reclaimer' and 'Trading Post' to retrieve the utility Artifacts from your GY.

Sacrifice the Modular creatures with 'Ironworks' or 'Ashnods' and other utility provided over and over again to spoil the counters with the "modular" ability (makes dem' superfaaaat).

Use the aggro creatures for...yeah...

Use "Conjurer's Bauble", "Reito Lantern", "Soldevi Digger", "Tel-Jilad Stylus" and "Junktroller" (!) to put the creatures back under the library again. (The troller can be exploited with "Dross Scorpion")

Use the Scry utility to put creatures under your lib from the top (sort top deck library - creatures to the bottom, casting, artifacts, and lands on top).

There are some more handy wombo-combos inherited with "Dross Scorpion", "Reckless Fireweaver", "Myr Turbine" or "Marionette Master".

Have fun!

P.S.: Mana Base is 50/50 because it doesn't matter since you bring the creatures with (2) colorless mana via Grenzo. Merely the enchantments, instants and sorceries need colored mana.