Cards like Jeskai Charm and Deflecting Palm are flavorful additions to your deck that should help show off Elsha's aptitude in battle, pumping up her prowess ability while protecting her from lethal wounds in combat
Simple cantrips like Opt and Preordain become powerful card draw spells, and since Matoya doesnt have a once per turn restriction, you can draw cards throughout your turn with effects like Search for Azcanta, Retreat to Coralhelm, and Palantr of Orthanc
While the commander itself does care about squirrels, you could use 10/10 Eldrazi to 3/3 Golems
Funny story though, I didnt realize I was drawn specifically to his art until I saw Deathsprout
At the beginning of your second main phase, you draw X cards and lose X life, where X is the number of your opponents who were dealt combat damage by Estinien Varlineau or a Dragon this turn