Even though Xenagos is likely to be great, theres very little room for growth
While I can respect the effectiveness of Pyreheart Wolf at pushing damage past a single Thragtusk, its much less effective at dealing with that same Thragtusk backed up by Trostani, Restoration Angel, and Armada Wurm
Fires of Yavimaya
This is everything Ive come to expect from a Mardu Commander deck so this Commander is a solid choice
Mana Vault Description : Mana Vault is an artifact that taps for three colourless mana, but it comes into play tapped and requires paying four mana during each upkeep or untap step, or else it deals one damage to its controller
In tempo shells with lots of cheap removal, cantrips, and counterspells like Daze to help trigger Katara and protect her, she can easily bury the opponent in card advantage