The only issue is that it's locked into Abzan colors, so you can't play it in a 1- or 2-color deck
The only thing holding it back is the slightly higher equip cost for regular creatures, but on balance you can safely say Mithril Coat is going to be a very nice upgrade most of the time
Bloodcrazed Neonate Bloodfire Dwarf Boggart Cursecrafter Boiling Earth Borborygmos Brallin, Skyshark Rider Brazen Dwarf Breath of Darigaaz Brimstone Trebuchet Brimstone Vandal Burn Down the House Cadira, Caller of the Small Calamity of Cinders Caldera Hellion Calix, Guided by Fate Callous Sell-Sword Canopy Surge Cartouche of Strength Case of the Gateway Express Catti-brie of Mithral Hall Caught in the Crossfire Cavalier of Flame Chamber Sentry Chandra Ablaze Chandra Nalaar Chandra's Fury Chandra, Awakened Inferno Chandra, Bold Pyromancer Chandra, Flame's Fury Chandra, Flamecaller Chandra, Roaring Flame Chandra, Torch of Defiance Chandra, the Firebrand Cinderclasm Cinderslash Ravager Circle of Power City on Fire Collective Defiance Comet Storm Commodore Guff
And that's a load of free ramping on an indestructible body that will help to cast more things that will help to give Karametra devotion more quickly and reliably than other Gods
