Get specific: Despite the temptation to include Myr creatures of all colors, it may help to decide on a specific strategy and build an Urtet deck to accommodate these situations
The Grinder is between Fable and Valakut Awakening in terms of power, and its closer to Fable than youre going to think
These include cards like Adorned Pouncer (double strike, eternalize), Cubwarden (lifelink, creature tokens), Felidar Sovereign (vigilance, lifelink, win con), Jinnie Fay (creature tokens), Kaheera (anthem effect), Loyal Warhound (ramp), and many many more
This strategy fits well with sacrificial cards like Sakura-Tribe Elder or effects that focus on cards leaving the graveyard like Willow Geist
Partner (You can have two commanders if both have partner.) Once a creature with toughness 2 or less has blocked this creature, changing the toughness of the blocking creature won't cause this creature to become unblocked
I can then pay mana to sacrifice a Pentavite to add a +1/+1 counter back onto Pentavus