Gandalfs Sanction In a spellslinger and/or storm deck, an opponent with a mana elf can just be domed for lethal out of the blue
The catch with MDFCs is that there are no ways to transform it once you've played it
Some partners like Jacob Frye and Evie Frye are exclusive and only have one other card they can be paired with in the command zone, so this pair counts as a Dimir commander
The fact that they become upset at how they are treated is a problem for another article, Im sure, but the simple answer is that the blame is twofold
Jacked Rabbit is a creature you want to ensure always has a lot of +1/+1 counters on it, as this will keep giving you 1/1 Rabbit tokens for each attack, and with high stats, it won't be in danger during combat
Old Knawbone helps to make Treasure tokens while Esika, God of the Tree, helps players to get the mana they need in the combinations they require for all these different colors of dragons