Kobold Overlord

First strike
Other Kobold creatures you control have first strike.

Coat of Arms

Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Goblin Warriors and a Goblin Shaman are on the battlefield, each gets +2/+2.)

Rograkh, Son of Rohgahh

First strike, menace, trample
Partner (You can have two commanders if both have partner.)

Kobolds of Kher Keep

Crookshank Kobolds

Kobold Taskmaster

Other Kobold creatures you control get +1/+0.

Crimson Kobolds

Goblin Bombardment

Sacrifice a creature: Goblin Bombardment deals 1 damage to any target.

Kobold Drill Sergeant

Other Kobold creatures you control get +0/+1 and have trample.