Bloomburrow.

Bloomburrow is a 78-card Commander deck led by Vren, the Relentless in the Dimir color identity (blue/black). TableCommander estimates this deck at bracket 2 — core / casual.

The mainboard runs 27 creatures, 11 instants, 5 sorceries, 3 artifacts, 1 enchantment, 1 planeswalker, and 30 lands, averaging 3.13 mana value across non-land cards. 65% of non-land cards cost 3 mana or less; 19% cost 5 or more.

This deck currently has legality issues for Commander.