mtg secret lair commander deck raining cats and dogs Commander: Mountain (1514) [Secret Lair Commander

When you ask someone about the main Creature type for most colors, the answer is usually clear

Despite being underwhelming from a power level standpoint, Grizzly Bears has been printed across over a dozen sets and even inspired numerous functional reprints, including Balduvian Bears, Forest Bear, Runeclaw Bear, and Bear Cub

Sure, some like Phyrexian Scriptures are just nuts and others like Chainers Torment are slow and easily answered

Further Upgrades The first cards I'd pick up to further juice up the deck would be untapped mana-fixing lands: Watery Grave, Shipwreck Marsh, Underground River, Morphic Pool, Darkslick Shores, Polluted Delta, Sunken Ruins, Undercity Sewers, Urborg, Tomb of Yawgmoth and then maybe a couple more Island / Swamp fetches

Nonetheless, Terminate is a great creature removal which you should include if you are playing those colors