Embret, of the Burning Scale

Squire (You may have one Squire card in your
command zone, partnered with any other
Commanders. You may not play your other
Commanders if your Squire is still in the
Command Zone.)
When another commander you control enters the
battlefield, untap it, it has haste until end of turn.
She races ahead into the fray, the battlefield
always aflame when you arrive.