Beyond Modular... Modern Format Edition

Modular has always been a favored mechanic of mine. Cheep colorless creatures that are immune to fear... and killing them just moves their damage potential around rather than getting rid of it. Not to mention all the combo potential.

Combine with dismantle and doubling season for two powerful ways to accelerate your +1/+1 counters. For example, with doubling season out you cast dismantle on a +4/+4 Arcbound Slith... modular moves all four +1/+1 counters wherever... doubling season then doubles them to 8 +1/+1 counters. Then Dismantle allows you to put 4 +1/+1 *or* 4 charge counters some where else (or the same place) and the doubling season doubles those too. 4 counters becomes 16 counters for the cost of a dismantle. Add Solarion to the mix for absurd +1/+1 counter generation.

Use muddle's transmute to get dismantle or additional arcbounds or as a "nope" for your opponent's own counters.

Shimmer Myrs let you flash your creatures in as blockers on your opponents turn, killing his creatures and creating a stomper ready to smack him back on your turn. Even if you have no need to block you should flash them in in response to your opponent ending turn just to avoid summoning sickness.

Use Garruk and Kuldotha Forger to feed the suicidal arcbounds or to dig for powerful synergy cards like Mycosynth Golem, Darksteel Forge, or (from sideboard) Darksteel Juggernaught, and Blightsteel Colossus.

Sideboard includes the newish Core Prowler which can let you add +1/+1 counters to all of your creatures on death and add an additional bit of damage to opponents and opponents creatures. Combined with modular its a great way to solve for lifegain or (when combined with Blightsteel Colosus) big stomper decks.

And this is why I love Arcbound + Darksteel. Low-cost, synergy,  tenacity, and versatility all in one tidy package.