Usually, we only see white planeswalkers become creatures, although its turned up in other colors occasionally
Survival of the Fittest is that enchantment, and its effect allows you to add any creature from your deck to your hand, at the cost of G and discarding a creature
To keep your cards in the best condition long-term its pretty simple and not too expensive
When in doubt, it can also help you out as well, but this is all about teamwork, right
Sevinne, the Chronoclasm has a cool ability, but they do not have a way to interact with the grave out of the box
You must then build a 100 card deck (including the Commander), but with a couple caveats: You may have no more than 1 copy of a given card in your deck (excluding basic lands) All cards in your deck must only contain mana symbols and colors matching your commanders color identity The Commander rules committee already has a rules document that clarifies all the specifics for how to play, so I wont bore you with any further rehashing here