According to EDHREC data, Squirrel, Eldrazi, and Saproling kindred decks look like a good place to start
Magic: The Gathering Card Rarities Are Easy To Discern Expansion Symbol Colors & Initials It is important to understand that there are just four standard tiers of rarity in Magic: The Gathering : Common, Uncommon, Rare, and Mythic Rare
Not only is it a hard-to-kill creature with ward, but it can shut down reanimation targets on ETB
Bracket three is where most "average" Commander decks are, whereas bracket four houses decks that are very strong, but not quite cEDH tier
A triggered ability that triggers when a spell is cast from anywhere other than your hand, such as that of The Thirteenth Doctor, functions only on the battlefield, so it doesn't trigger when you cast that spell from a zone other than your hand