mtg cards that sacrifice lands Famished Worldsire's abilities in Magic: The Gathering Scapeshift | Cards & Hobbies

Whispersilk Cloak does that and also plays well with commanders intent on attacking

Theres also a very good chance that a version of Kethis that looks more like the current Standard decks, but with the addition of Emry will be one of the best decks in Historic

With all that ramp, you can start making use of Urza's third ability, to start exiling the top card of your library to cast it for free

+ Creatures you control with power 4 or greater gain hexproof and indestructible until end of turn

EDHREC can help you focus on one card with a certain commander , but it is not great for looking at specific cards with a keyword (Scryfall is a great tool for that)

Yes, theres no difference between the cEDH ban list and the general Commander ban list